Blake puts eight marbles in the bag cold puts nine marbles in the bag then Blake takes out seven marbles from the bag how many marbles are in the bag now

a. The three by three matrix E13 will add row 3 to row 1 is [tex]\left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&1\end{array}\right][/tex]

b. The matrix adds row 1 to row 3 and at the same time row 3 to row 1 is [tex]\left[\begin{array}{ccc}2&0&0\\0&2&0\\0&0&2\end{array}\right][/tex]

c. The matrix adds row 1 to row 3 and then adds row 3 to row 1 [tex]\left[\begin{array}{ccc}0&0&2\\0&2&0\\2&0&0\end{array}\right][/tex]

A matrix is a rectangular array of numbers, symbols, or expressions, arranged in rows and columns. In linear algebra, matrices are used to represent and manipulate systems of linear equations.

A. In order to find a 3x3 matrix that adds row 3 to row 1, we can create an identity matrix and replace one of its rows with the sum of row 1 and row 3. An identity matrix is a square matrix with 1's along its main diagonal and 0's everywhere else.

Let I be a 3x3 identity matrix:

[tex]= > \left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&1\end{array}\right][/tex]

Now, let's replace row 1 of the identity matrix with the sum of row 1 and row 3:

[tex]= > \left[\begin{array}{ccc}1&0&0\\0&1&0\\1&1&1\end{array}\right][/tex]

B. To find a matrix that adds row 1 to row 3 and row 3 to row 1 simultaneously, we can use the matrix E13 found in part A and multiply it with itself:

[tex]= > \left[\begin{array}{ccc}2&0&0\\0&2&0\\0&0&2\end{array}\right][/tex]

C. To find a matrix that adds row 1 to row 3 and then adds row 3 to row 1, we can use the matrices E13 and E31, where E31 is a 3x3 matrix that adds row 1 to row 3:

[tex]= > \left[\begin{array}{ccc}0&0&1\\0&1&0\\1&0&0\end{array}\right][/tex]

Now, let's multiply E13 with E31:

[tex]= > \left[\begin{array}{ccc}0&0&2\\0&2&0\\2&0&0\end{array}\right][/tex]

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As x increases from x=1 to x=5, the value of h remains constant at 4 and the output of the function v(x) changes from v(1) = 5 to v(5) = 29, with a difference of 24.

A function is a mathematical rule that assigns a unique output for every input.

Given the function h = 4, we can see that the output is always 4, regardless of the input value.

Now, if we consider the function

=> v(x) = x² + h,

we can see that the output is dependent on the input x and the constant value of h. As x increases from x=1 to x=5, the output of v(x) will also change.

We can calculate the value of v(1) as

=> v(1) = 1² + 4 = 5.

And similarly, we can calculate the value of v(5) as

=> v(5) = 5² + 4 = 29.

The difference between v(5) and v(1) can be calculated as

=> v(5) - v(1) = 29 - 5 = 24.

This represents the change in the output of the function v(x) as x increases from x=1 to x=5.

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Proportionately, since the Sleepwell Hotel served 8.4% less orange juice than it did the previous year, the total number it served this year is 751 gallons.

Proportion involves the equation of two ratios or values.

Proportion is a fractional value like ratios and is depicted in percentages, decimals, or fractions.

The quantity of orange juice served last year = 820 gallons

The percentage served this current year = 91.6% (1 - 8.4%)

Proportionately, the current year's quantity = 751 gallons (820 x 91.6%)

Thus, we can conclude that proportionately, the hotel served 751 gallons, which is 8.4% less than last year's.

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The value of SAT from the following enumerated data is 7 (option a)

Enumerated data;

A set of named values known as enumeration constants, which are integral constants, make up an enumeration, a data type. Because you must list (enumerate) every value before giving it a name, an enumeration is also known as an enumerated type.

Enumeration refers to the act of counting, reciting, or listing numbers. If he starts with a deep sigh, a waiter's long list of all the various salad dressings can sound a touch hostile. Enumeration occurs while you are reciting a list of items.

Here,

Option a 7 is the value of SAT

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The most appropriate level of measurement for the Monthly Rainfall is (d) Ratio .

Ratio measurement is used for variables where the values have a meaningful order, the differences between them are meaningful, and there is a true zero point. For example, height, weight, or time.

In the case of monthly rainfall,

(i) the values have a meaningful order (more rainfall or less rainfall),

(ii) the differences between the values are meaningful (0.2 inches difference),  

(iii) there is true zero point  (month with 0 inches of rainfall).

Therefore, the most appropriate level of measurement is Ratio .

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate.

Monthly rainfall: 3.4 in, 3.6 in, 3.8 in, 4 in, and 4.2 in

Choose the correct answer below.

(a) Nominal

(b) Ordinal

(c) Interval

(d) Ratio

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In ΔKLM, that measure ∠M = 90°, ML = 8, LK = 17, and KM = 15. cosine of L is 0.88

The cosine of L is worked using SOH CAH TOA

Sin = opposite / hypotenuse - SOH

Cos = adjacent / hypotenuse - CAH

Tan = opposite / adjacent - TOA

The triangle described is a right triangle of

opposite = 8

adjacent = 15

hypotenuse = 17

The cosine of L is calculated using cos, CAH

let the angle be x

Cos x = adjacent / hypotenuse

cos x = 15 / 17

x = arc cos (15/17)

x = 28.07 degrees

cosine of L = 15/17 = 0.88

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It measures the absolute variability of a distribution; the higher the dispersion or variability, the greater is the standard deviation and greater will be the magnitude of the deviation of the value from their mean.

Now, According to the question:

A standard deviation (or σ) is a measure of how dispersed the data is in relation to the mean. Low standard deviation means data are clustered around the mean, and high standard deviation indicates data are more spread out.

Standard deviation is the measure of dispersion of a set of data from its mean. It measures the absolute variability of a distribution; the higher the dispersion or variability, the greater is the standard deviation and greater will be the magnitude of the deviation of the value from their mean.

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So, the domain for the quantifier in ∃x∃y(x ≠ y ∧ ∀z((z = x) ∨ (z = y))) is the set of all non-empty sets.

The quantifier ∃x∃y(x ≠ y ∧ ∀z((z = x) ∨ (z = y))) is a statement in first-order logic that says "there exists x and there exists y such that x is not equal to y and for all z, z is equal to x or z is equal to y".

The domain for this quantifier is the set of all values for which the statement inside the quantifier is true.

In this case, the domain for the quantifier is the set of all non-empty sets, since for any non-empty set, we can find at least two distinct elements x and y, such that x is not equal to y and for any element z in the set, either z is equal to x or z is equal to y.

So, the domain for the quantifier in ∃x∃y(x ≠ y ∧ ∀z((z = x) ∨ (z = y))) is the set of all non-empty sets.

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So, the domain for the quantifier in ∃x∃y(x ≠ y ∧ ∀z((z = x) ∨ (z = y))) is the set of all non-empty sets.

The quantifier ∃x∃y(x ≠ y ∧ ∀z((z = x) ∨ (z = y))) is a statement in first-order logic that says "there exists x and there exists y such that x is not equal to y and for all z, z is equal to x or z is equal to y".

The domain for this quantifier is the set of all values for which the statement inside the quantifier is true.

In this case, the domain for the quantifier is the set of all non-empty sets, since for any non-empty set, we can find at least two distinct elements x and y, such that x is not equal to y and for any element z in the set, either z is equal to x or z is equal to y.

So, the domain for the quantifier in ∃x∃y(x ≠ y ∧ ∀z((z = x) ∨ (z = y))) is the set of all non-empty sets.

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The linear pair is the correct answer for a pair of adjacent angles whose opposite rays form their non-common sides.

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(x + 2) ^2 + (y - 3) ^2 + (z - 1^2 = 1 is an equation for a sphere with a center of (-2,3,1) and a tangent to the xz plane.

An algebraic equation, also known as a polynomial equation, is a mathematical equation of the form P=0, where P is a polynomial with coefficients in some field, most commonly the field of rational numbers.

Here,

The equation of a sphere with center (x0, y0, z0) and radius r is given by:

(x - x0)^2 + (y - y0)^2 + (z - z0)^2 = r^2

In this case, the center of the sphere is (-2, 3, 1) and it is tangent to the xz plane, which has equation z = 0. Hence, the sphere must have a z-coordinate of 1, so the equation becomes:

(x + 2)^2 + (y - 3)^2 + (z - 1)^2 = r^2

We need to find the value of r such that the sphere is tangent to the xz plane. If a sphere is tangent to a plane, it means that the distance between the center of the sphere and the plane is equal to the radius of the sphere. The distance between a point (x0, y0, z0) and the plane z = k is given by |z0 - k|. Hence, the distance between the center of the sphere (-2, 3, 1) and the xz plane is given by:

|1 - 0| = 1

Therefore, the radius of the sphere is equal to 1, so the equation of the sphere is:

(x + 2)^2 + (y - 3)^2 + (z - 1)^2 = 1^2

Simplifying, we obtain the equation of the sphere:

(x + 2)^2 + (y - 3)^2 + (z - 1)^2 = 1 is an equation for the sphere with center (-2,3,1) that is tangent to the xz plane.

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That 16 meters of electric wire costs 3214, one meter of electric wire costs 3214/16 = 200.6875.

To find the expense of 11 meters of wire, increase the expense per meter by 11:

Cost of 11 meters of wire = 11 * 200.6875 = 2,207.5625

Thus, Jermaine's dad will burn through 2,207.5625 for 11 meters of wire.

The expense of 16 meters of electric wire is 3214, so the expense per meter can be determined by separating the complete expense by the quantity of meters: 3214/16 = 200.6875. To find the expense of 11 meters of wire, we increase the expense per meter by 11: 200.6875 * 11 = 2,207.5625. This implies that Jermaine's dad will burn through 2,207.5625 for 11 meters of wire. This computation gives the expense of the wire in view of a known cost for every meter, permitting us to effortlessly gauge the expense of various lengths of wire.

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The complete question is :

16 m of electric wire costs 3214, how much will jermaine's father spend for the 11 m of wire cost?​

Answer: In a dilation with scale factor k, each point (x,y) is transformed to the point (kx,ky). So, if the scale factor is 2, the points A, B, C, and D will be transformed to the following:

A' (-3 * 2, -2 * 2) = (-6, -4)

B' (-3 * 2, 1 * 2) = (-6, 2)

C' (0 * 2, 3 * 2) = (0, 6)

D' (2 * 2, -1 * 2) = (4, -2)

So, the image points after the dilation with scale factor 2 are A' = (-6,-4), B' = (-6,2), C' = (0,6), and D' = (4,-2).

Step-by-step explanation:

A budget is a regular summary of the anticipated earnings and spending for a specific time period.

The calculation of James' monthly salary is as follows:

income each month = $47,000 / 12 = 3916

The necessary James personal monthly budget is given as follows;

The monthly personal budget is determined by inputting the supplied numbers into a budget template as shown below based on the monthly expenses mentioned above;

fixed expenses

Income

$3,916.6

Rent \s$950

Insurance for tenants

$25

Health Insurance: $185 Retirement: 401(k)

$157

vehicle insurance

$120

Utilities

a $100 cell phone

$85

Credit card for $70 for cable

$150

Car loan $554

$2,396 in total fixed expenditures

variable costs

Clothing  $8

Groceries n $300

Entertainment $196

$576 in total variable costs

Savings                                $944.

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The statement that identifies the scale used in this map would be

1 inch equals 19 miles.

A map is a visual depiction of specific features of a location, typically created on a flat surface. Maps provide straightforward, visible information about the globe. They demonstrate the sizes and shapes of the world's nations, the locations of its characteristics, and the distances between regions to teach about it.

Given:

There are 4 towns which are separated by 3 inches apart.

The actual distance apart = 57 miles

So, the actual scale is

3 inches = 57 miles

1 inch = x miles

x miles = 57/3

x = 19 miles.

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All the correct values that make the given inequality true are,

⇒ d = - 24, - 23, - 21, - 19, - 14

A relation by which we can compare two or more mathematical expression is called an inequality.

We have to given that;

The inequality is,

⇒ 3d ≥ - 72

Now, We can solve as;

⇒ 3d ≥ - 72

Divide by 3 both side,

⇒ d ≥ - 72/3

⇒ d ≥ - 24

Thus, All the correct values that make the given inequality true are,

⇒ d = - 24, - 23, - 21, - 19, - 14

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The equation of sphere is x² + 10x + y² - 4y + z² - 12z + 41 = 81.

The collection of all points that are distanced from the centre by a certain amount, or radius, is referred to as a sphere in three dimensions. The shape of a sphere is spherical and symmetrical.

The distances between each surface point and the centre are equal throughout the three dimensions of the solid. It has a surface area and a volume based on its radius. The formula for a sphere's volume is V = 4/3 r3, where r is the radius and V is its volume. Half of a sphere's diameter makes up its radius.

The equation of a sphere with center (x0, y0, z0) and radius r is given by:

(x - x0)² + (y - y0)² + (z - z0)² = r²

So, for a sphere with center (-5, 2, 6) and radius 9, the equation would be:

(x + 5)² + (y - 2)² + (z - 6)² = 9²

which simplifies to:

x² + 10x + y² - 4y + z² - 12z + 41 = 81.

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Given two points: A(-3,4) and B(1, -2), the distance  between point A and point B is 7.2 units.

The distance between two points can be calculated using the Pythagorean Theorem.

We have two points: A(-3,4) and B(1, -2)

Hence,

xA = -3

yA = 4

xB = 1

yB = -2

The length of the sides of the right triangle are:

x-side = |xB - xA| = |1 - (-3)| = 4

y-side = |yB - yA| = |-2 - 4| = 6

Applying the Pythagorean Theorem:

AB = √(4² + 6²)

AB = √(16 + 36)

AB = √52 = 7.2

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Answer:

177,147

Step-by-step explanation:

9x9x9x9x9= 59,049

3x59,049= 177,147

a) The function is increasing on the following domain: (0,2).

b) The function is constant on the following domain: (10,14).

c) The fastest rate of decrease is given on the following interval: (8,10).

d) The height of the balloon after 14 seconds is of zero.

The fastest rate of decrease is given by the highest division of the decrease by the time.

The intervals of decrease are given as follows:

When the balloon hits the ground, it doesn't go back up again, hence the height after 14 seconds is of zero.

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The measure of the angle ∠G nearest to tenth place will be 77.1°.

The squared of the size of any solitary side of either a triangle is equal, by the cosine rule, to the total of the squares of the lengths of the other two sides, times by the cosine of something like the angle they are a part of.

Let the triangle ΔABC, then the cosine law is given as,

c² = a² + b² - 2 a·b cos C

In ΔGHI, g = 91 cm, h = 73 cm and i = 73 cm. Then the measure of the angle ∠G is given as,

g² = h² + i² - 2 h·i cos G

(91)² = (73)² + (73)² - 2 x 73 x 73 cos G

8281 = 5329 + 5329 - 10658 cos G

10658 cos G = 5329 + 5329 - 8281

10658 cos G = 2377

cos G = 0.223

cos G = cos 77.1°

The measure of the angle ∠G nearest to tenth place will be 77.1°.

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Using algebraic expression, She needs to sell 150 / 5 = 30 T-shirts.

An algebraic expression is a mathematical phrase that can contain numbers, variables, and operations (such as addition, subtraction, multiplication, and division). It represents a value that can be determined if the values of the variables are known. An algebraic expression does not contain an equal sign and cannot be solved like an equation, but it can be simplified or manipulated using algebraic rules. For example, the expression 2x + 3y is an algebraic expression, where x and y are variables.

Harper's fixed costs for starting the business are $150.

She earns $10 for each T-shirt sold, and she spends $5 on each T-shirt she buys.

So, her profit is $10 - $5 = $5 per T-shirt.

To break even, Harper needs to earn enough money from selling T-shirts to cover her fixed costs of $150.

Therefore, she needs to sell 150 / 5 = 30 T-shirts.

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48 plastic bandages should a small kit have

A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0.

Given that the ratio of fabric bandages to plastic bandages in each kit is 3 to 9

A small kit has 16 fabric bandages then we have to find the number of plastic bags.

Let x be the number of plastic bags for 16 fabric bandages.

3/9=16/x

Apply cross multiplication

3x=16×9

3x=144

Divide both sides by 3

x=48.

Hence, 48 plastic bandages should a small kit have

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The given points (a) lies on the line, (b) does NOT lie on the line, and (c) lies on the line.

A point lies on a line if and only if it can be written as the sum of a scalar multiple of a direction vector and a position vector of the line.

To determine if each point lies on the line defined by X = -5 + t, y = 6t, and z = 6+ t, we can substitute each point into this equation to see if it is equivalent.

(a) (0, 30, 11):

-5 + t = 0, so t = 5

y = 6t = 6 × 5 = 30

z = 6 + t = 6 + 5 = 11

So, (0, 30, 11) can be written as -5 + 5i + 6 × 5j + 6k = -5i + 30j + 11k, which lies on the line.

(b) (5, 6, 11):

-5 + t = 5, so t = 10

y = 6t = 6 × 10 = 60

z = 6 + t = 6 + 10 = 16

So, (5, 6, 11) does NOT lie on the line.

(c) (-7, -12, 4):

-5 + t = -7, so t = -2

y = 6t = 6 × -2 = -12

z = 6 + t = 6 + -2 = 4

So, (-7, -12, 4) can be composed as -5 - 2i + -12j + 4k = -7i - 12j + 4k, which lies on the line.

Therefore, (a) lies on the line, (b) does NOT lie on the line, and (c) lies on the line.

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--The given question is incomplete; the complete question is

"Determine whether each point lies on the line.

X = -5 + t, y = 6t, z = 6+ t                                                                                                          (a) (0, 30, 11)                                                                                                                                (b) (5, 6, 11)                                                                                                                                          (c) (-7, -12, 4)"--

3. The table represents a linear function because there is a constant rate of change in the input and output values.

4. The graph represents a nonlinear function because the rate of change is not constant.

5. The table represents a linear function because the graph shows a constant rate of change.

6. The equation represents a nonlinear function because its graph contains the points (−1, 3), (0, 0), and (1, 3), which are not on a straight line.

7. The table that represents a linear function is given as follows:

x −2 −1 0 1 2

y 5 3 1 −1 −3

A relation represents a linear function when the rate of change of the variable y relative to the variable x is constant.

In this problem, we have that:

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Answer:

Step-by-step explanation:

b

Answer:

2/1

Step-by-step explanation:

black is 24 and blue is 12 so it'd be 24/12 which simplifies to 2/1

The rational, irrational and imaginary zeroes for function c(x) = 18x³ + 9x² - 2x -1 are:

To solve this proble, we will use Rational Root Theorem and Descartes Rules of Signs.

Based on Rational Root Theorem, we can find that the function c(x) has rational roots of:

c(x) = 18x³ + 9x² - 2x -1

possible roots = ± {factors of a₀} / {factors of aₙ}

From the given function, we can use the possible roots concept:

Possible roots = ± factors of 18

                              factors of 1

Possible roots = ± {1, 2, 3, 6, 9, 18}

                                     {1}

We can conculde some possible roots such as: {-18, -9, -6, -3, -2, -1, 1, 2, 3, 6, 9, 18}

Next, we need to confirm which possible roots are the rational roots by subtitute the possible roots into the function c(x). The rational roots will produce the function equals to zero (0).

c(1) = 18(1)³ + 9(1)² - 2(1) -1

c(1) = 18 + 9 - 2 - 1 = 24 --> irrational roots

c(2) = 18(2)³ + 9(2)² - 2(2) -1

c(2) = 18(8) + 9(4) - 2(2) - 1

c(2) = 144 + 36 - 4 - 1 = 175 --> irrational roots

c(3) = 18(3)³ + 9(3)² - 2(3) -1

c(3) = 18(27) + 9(9) - 2(3) - 1 = 560 --> irrational roots

c(6) = 18(6)³ + 9(6)² - 2(6) -1

c(6) = 4.199 --> irrational roots

c(9) = 18(9)³ + 9(9)² - 2(9) -1

c(9) = 13,832 --> irrational roots

c(18) = 18(18)³ + 9(18)² - 2(18) -1

c(18) = 107,855 --> irrational roots

c(-1) = 18(-1)³ + 9(-1)² - 2(-1) -1

c(-1) = -18 - 9 + 2 - 1 = -8 --> irrational roots

c(-2) = 18(-2)³ + 9(-2)² - 2(-2) -1

c(-2) = -105 --> irrational roots

c(-3) = 18(-3)³ + 9(-3)² - 2(-3) -1

c(-3) = -400 --> irrational roots

c(-6) = 18(-6)³ + 9(-6)² - 2(-6) -1

c(-6) = -3,553 --> irrational roots

c(-9) = 18(-9)³ + 9(-9)² - 2(-9) -1

c(-9) = -12,376 --> irrational roots

c(-18) = 18(-18)³ + 9(-18)² - 2(-18) -1

c(-18) = -120,176 --> irrational roots

Next, we will try to use Descartes Rule of Signs:

c(x) = 18x³ + 9x² - 2x -1

c(x) = +18x³ + 9x² - 2x -1

The sign is changing once, then the function c(x) has 1 positive roots.

Next, we change the value of (x) into (-x) and put it into the function:

c(-x) = 18(-x)³ + 9(-x)² - 2(-x) -1

c(-x) = -18x³ + 9x² + 2x -1

The signs are changing twice on between the first and second coefficient and between third and fourth. Hence the funciton c(x) has 2 or zero negative roots.

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During the resting phase, the electrical potential energy of a typical k ion inside of the cell is 80 eV. So the option 4 is correct.

The definition of electric potential energy is

U = qV

Individual particle electric charges are always multiples of the fundamental charge e. (the charge on a single proton). Use of the constant e as a unit is frequently more practical than replacing e with a numerical value. A proton with a potential of 80 V therefore has energy

U = qV

We can write it as

U = e(80 V)

So U = 80 eV

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The complete question is:

Ionic Potentials across Cell Membranes Conceptual Question

In its resting state, the membrane surrounding a neuron is permeable to potassium ions but only slightly permeable to sodium ions. Thus, positive K ions can flow through the membrane in an attempt to equalize K concentration, but Na ions cannot as quickly.

This leads to an excess of Na ions outside of the cell. If the space outside the cell is defined as zero electric potential, then the electric potential of the interior of the cell is negative. This resting potential is typically about -80 mV. A schematic of this situation is shown in the figure.

During the resting phase, what is the electrical potential energy of a typical K ion inside of the cell?

1. -40 meV

2. +40 meV

3. -80 meV

4. +80 meV

5. 0 meV

With 96% confidence, we estimate between 93.7% and 99.1% of all northern Kentucky residents are opposed to tolls on the Brent Spence Bridge.

To estimate the proportion of northern Kentucky residents opposed to tolls on the Brent Spence Bridge, we need to find the confidence interval of the sample proportion.

Given the sample size and the number of respondents opposed to tolls, we can use the formula for the standard error of a sample proportion:

SE = sqrt(p * (1-p) / n)

Where p = 0.964 (proportion of respondents opposed to tolls), n = 1634 (sample size)

SE = sqrt(0.964 * 0.036 / 1634) = 0.013

Now we can calculate the lower and upper limits of the 96% confidence interval:

CI lower = p - (1.96 * SE) = 0.964 - (1.96 * 0.013) = 0.937

CI upper = p + (1.96 * SE) = 0.964 + (1.96 * 0.013) = 0.991

After converting to percentages, the lower and upper limits of the interval can be rounded to two decimal places:

CI lower = 93.7%

CI upper = 99.1%

So with 96% confidence, we estimate between 93.7% and 99.1% of all northern Kentucky residents are opposed to tolls on the Brent Spence Bridge.

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At the equator, an arc-second of longitude approximately equals an arc-second of latitude, which is 1/60th of a nautical mile (or 101.27 feet or 30.87 meters)

1° = 11(5280) ft

1° = 58080 ft

1' = 58080 ft/ 60  

1" = 58080 ft / 3600

At the equator 360° = 3960 miles

1° = 11 miles

Knowing that one mile is 5280 feet we can determine the length of one minute and one second.

An equator is an imaginary line around the middle of a planet or other celestial body. It is halfway between the north pole and the south pole, at 0 degrees latitude. An equator divides the planet into a northern hemisphere and a southern hemisphere. Earth is widest at its Equator.

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At the equator, an arc-second of longitude approximately equals an arc-second of latitude, which is 1/60th of a nautical mile (or 101.27 feet or 30.87 meters)

1° = 11(5280) ft

1° = 58080 ft

1' = 58080 ft/ 60  

1" = 58080 ft / 3600

At the equator 360° = 3960 miles

1° = 11 miles

Knowing that one mile is 5280 feet we can determine the length of one minute and one second.

An equator is an imaginary line around the middle of a planet or other celestial body. It is halfway between the north pole and the south pole, at 0 degrees latitude. An equator divides the planet into a northern hemisphere and a southern hemisphere. Earth is the widest at its Equator.

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