−3b+2.5=4 solve for b

The value of AB in the triangle is 2.5 cm and the value of x in the triangle is 10 units

From the question, we have the following parameters that can be used in our computation:

The triangle

On the triangle, we have the following equivalent ratio

AB : 4 = 10 : 16

Express as fraction

So, we have

AB/4 = 10/16

This gives

AB = 4 * 10/16

Evaluate

AB = 2.5

Here, we understand that the line bisects the angle BAC

This means that

x = 20 - x

So, we have

2x = 20

Divide

x = 10

Hence, the value is 10

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Algebraic expression to represent the given situation would be, P = 2N - 7

What is algebraic expression?

When we utilize numbers and words to solve a mathematical problem, we are using algebraic expressions.

Let P represent the number of pennies in Greg's pocket.

We know that the number of pennies is 7 less than twice the number of nickels, which can be written as:

P = 2N - 7

This expression represents the number of pennies in terms of the number of nickels.

Therefore, Algebraic expression to represent the given situation would be, P = 2N - 7

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The slope of a horizontal line perpendicular to a horizontal line is infinity or undefined.

The slope of a line is the that of the inclination that is makes with a horizontal line.

So, the slope of horizontal line is 1 because the value of tam(0 degrees) is also 1.

A line that is perpendicular to the horizontal line will have a the value of angle to be 90 degrees and we know that,

tan (90 degrees) = undefined/infinity

So, here we are concluding that the slope of any line that is being lying perpendicularly on any horizontally lying line is infinity or undefined.

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The area of a trapezoid with the given parallel sides and height is 4x+8 square units. Therefore, option B is the correct answer.

The area of a trapezoid can be calculated if the length of its parallel sides and the distance (height) between them is given. The formula for the area of a trapezoid is expressed as, A = ½ (b₁+b₂)×h.

where (A) is the area of a trapezoid, 'b₁' and 'b₂' are the bases (parallel sides), and 'h' is the height (the perpendicular distance between b₁ and b₂).

1) Given that, b₁=x-3, b₂=x+7 and the height=4

Now, area of a trapezoid = 1/2 (x-3+x+7)×4

= 2×(2x+4)

= 4x+8 square units

Hence, option B is the correct answer.

2) The given polynomials are -3x²-7x+9 and -5x²+6x-4.

Here, sum = -3x²-7x+9+(-5x²+6x-4)

= -3x²-7x+9-5x²+6x-4

= -8x²-x+5

Hence, option 1 is the correct answer.

Therefore, the area of a trapezoid is 4x+8 square units.

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It will take 15 revolutions per minute.

What is the unit rate?

An item's unit rate is its price for one of them. This is expressed as a ratio with a one as the denominator. For instance, if you covered 70 yards in 10 seconds, you covered 7 yards on average every second. Seven yards in one second and 70 yards in ten seconds are both ratios, but only one of them is a unit rate.

Here, we have

Given: a wheel for a wheel of winning game makes one revolution in 4 seconds.

Take a time for 1 revolution = 4 seconds

Assume that the unit rate in terms of revolutions per minute is x.

1 rev/4 second = x rev/60 second

4x = 60

x = 15

Hence, it will take 15 revolutions per minute.

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Answer:

x = 24°

Step-by-step explanation:

See the attached worksheet.   Let a and b stand for the two unknown angales as shown on the worksheet.  Since the sum of angles across a straight line is 180°, we can express the two angles as:

a = 180°-x, and

b = 180° - 111° or b = 69°

The sum of the interior angles of a quadrilateral is 360°.  Set the four angles equal to 360° and solve for x.

x = 24°

An explicit formula in slope intercept form for the given expression is aₙ = 5n - 8.

Mathematically, the slope-intercept form of the equation of a straight line is given by this mathematical expression;

y = mx + c

Where:

Based on the information provided above, we can logically deduce that an equation in slope-intercept form that models the situation is given by:

aₙ = -3 + 5(n - 1)

aₙ = -3 + 5n - 5

aₙ = 5n - 8

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Points of discontinuity for the rational function y=(x+3)(x-5)(x+7)/(x+1)(x+4) are x = -1 and x = -4.

A rational function is a function that can be expressed as the ratio of two polynomial functions. In the case of the given rational function y=(x+3)(x-5)(x+7)/(x+1)(x+4), the numerator is a polynomial of degree 3, and the denominator is a polynomial of degree 2.

To find any points of discontinuity for a rational function, we need to determine where the denominator is equal to zero. Division by zero is undefined, so any value of x that makes the denominator equal to zero will be a point of discontinuity for the function.

In this case, we set the denominator (x+1)(x+4) equal to zero and solve for x:

(x+1)(x+4) = 0

This equation is true if either (x+1) = 0 or (x+4) = 0. So we have two solutions:

x+1 = 0 or x+4 = 0

x = -1 or x = -4

These values of x make the denominator of the function equal to zero, which means that the function is undefined at these points. These points are known as vertical asymptotes of the function, since the function approaches infinity as x approaches these points from either side.

It's important to note that the numerator of the function does not affect the points of discontinuity, since it is always defined for any value of x. Therefore, the points of discontinuity only depend on the denominator of the function.

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It will take Thomas 40 months to empty the account if he continues to take out $400 each month of $16,000.

To find out how many months it will take for Thomas to empty the account, we need to set M to 0 and solve for t. This will give us the number of months it will take for Thomas to spend all of the $16,000 he won on the game show. The equation we need to solve is:
0 = 16000 - 400t

First, we'll isolate the variable t on one side of the equation by adding 400t to both sides:
400t = 1600

Next, we'll divide both sides of the equation by 400 to get the value of t:
t = 16000/400

Simplifying the right side of the equation gives us:
t = 40

So, it will take Thomas 40 months to empty the account if he continues to take out $400 each month for spending money.

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The correct steps for bisecting line segment AB using a reflective device is given below:

Cutting a line exactly in half is known as bisecting it. Due to the fact that the line you are drawing will be at a right angle to the initial line, it is also sometimes referred to as creating a perpendicular bisector.

A compass, pencil, and ruler are required.

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Answer: 7:5

Step-by-step explanation:

Answer:

(4,4)

By using a graphing we can see that the lines intersect at (4,4).

therefore, 4 is the solution

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Minda must view 76 movies to make Movie Prime the better deal

Inequality is a relation that compares two numbers or other mathematical expressions in an unequal way.

The symbol a < b indicates that a is smaller than b.

When a > b is used, it indicates that a is bigger than b.

a is less than or equal to b when a notation like a ≤ b.

a is bigger or equal value of an is indicated by the notation a ≥ b.

Let, The number of movies be 'x' and from the given information the two equations can be formed as,

5.95x and 150 + 3.95x.

And  to make Movie Prime the better deal,

150 + 3.95x < 5.95x.

2x > 150.

x > 75.

So, Minda must watch greater than 75 movies.

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Answer:

A

I believe because p→q

q→p

The value of x is 18.

The value of y is 15.6.

Pythagorean theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

We have,

From the figure,

Sin 30 = 9/x

1/2 = 9/x

x = 9 x 2

x = 18

Now,

Using the Pythagorean theorem.

x² = 9² + y²

18² = 81 + y²

y² = 325 - 81

y = √244

y = 15.6

Thus,

x = 18

y = 15.6

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Answer:

= 6 years old.

Step-by-step explanation:

Let your age 2 year ago be = x

= 2x

again

Let your age 2 years from now be x

= 2x

therefore

= 2x +2x = 24

= 4x = 24

= 4x/4 = 24/4

= x = 6

therefore you're 6 years old.

Rafael will take 75 minutes to run 10 miles at the same rate.

Solution:

We know that Rafael can run 4 miles in 30 minutes.

So, we can find his pace, as follows:

30 minutes/ 4 miles = 7.5 minutes per mile.

So, for 10 miles he will take 7.5* 10 = 75 minutes.

Hence, it will take Rafael 75 minutes to run 10 miles.

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Answer:51. 2%

Step-by-step explanation:

24+32+(16×4)+7(2+16)=24+32+64+126=246

26g of Epsom salt contains 126g of water of crystallisation.Hence, 100g of Epsom salt contains 100×126/246The % of H2​O in MgSO4​.7H2​O=

360 guests were at the gala

Ratio is used to compare two or more quantities. It is used to indicate how big or small a quantity is when compared to another.

Since the ratio of staff to guests at the gala was 3 to 5.

Let S and G represent the number of staff and guests respectively. From the given information, we can write:

S/G = 3/5

S + G = 576

Thus, S = 576 - G

Put S = 576 - G in S/G = 3/5 and solve for G. That is:

(576 - G)/G = 3/5

3G = 5(576 - G)

3G = 2880 - 5G

3G + 5G = 2880

8G = 2880

G = 2880/8

G = 360

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Answer:

25

Step-by-step explanation:

The equation of a circle centered at the origin with radius r is given by:

(x^2) + (y^2) = r^2

In this case, the circle is centered at the origin and has a radius of 5, so the equation is:

x^2 + y^2 = 25

Therefore, the equation of the circle is: x^2 + y^2 = 25

Answer:

Step-by-step explanation: 32 because 9 x4 lol

Answer:

Sarah must get between a 67 and 85.

Step-by-step explanation:

69 + 75 + 65 + 83 = 292

70 ≥ 1/8(292 + 4x) ≥ 79

70 ≥ 0.5x + 36.5 ≥ 79

67 ≥ x ≥ 85

Answer:

l is parallel to m and u is parallel to t

Step-by-step explanation:

Parallel line means that never meet each other

11th term of the given geometric sequence is [tex]a_{n} = 7(5^{n-1})[/tex]

In a Geometric Sequence each term is found by multiplying the previous term by a constant.

Given geometric sequence = 7,35,175

Nth term of the geometric sequence [tex]a_{n}=a_{1} .r^{n-1}[/tex]

[tex]a_{1}=7[/tex]

[tex]r= \frac{35}{7} =5[/tex]

Nth term of the geometric sequence

[tex]a_{n} = 7(5^{n-1})[/tex]

Hence, the Nth term of the given geometric sequence is  [tex]a_{n} = 7(5^{n-1})[/tex]

Step 1: Equation for Roller Coaster Height.

The general form for the equation of a circle at the origin is:

[tex]\boxed{\left\begin{array}{ccc}\text{\underline{Equation of a Circle (at origin):}}\\\\x^2+y^2=r^2\\\\\bullet \ \text{where 'r' is the radius of the circle}\end{array}\right}[/tex]

It is given that the height of the roller coaster is 30 feet. Thus, r = 30. Plug this into the equation above and solve for 'y.'

[tex]\Longrightarrow x^2+y^2=(30)^2\\\\\\\\\Longrightarrow x^2+y^2=900\\\\\\\\\therefore \boxed{\boxed{y=\sqrt{900-x^2} }}[/tex]

Step 2: Graph of Roller Coaster Model.

Refer to the attached image(s).

Step 3: Equation for Horizontal Distance of Beams.

Going back to the equation we got in step (1), we can solve for the variable ‘x.’

[tex]\Longrightarrow y=\sqrt{900-x^2}\\\\\\\\\therefore \boxed{\boxed{x=\pm\sqrt{900-y^2}}}[/tex]

Step 4: Algebraic Solution for Beam Placement.

Given a height, y = 25 ft. We can plug this into the equation above and solve for 'x.'

[tex]\Longrightarrow x=\pm\sqrt{900-(25)^2}\\\\\\\\\Longrightarrow x=\pm\sqrt{275}\\\\\\\\\Longrightarrow x=\pm5\sqrt{11}\\\\\\\\\therefore \boxed{\boxed{x\approx\pm16.58 \ ft}}[/tex]

Step 5: Placement of Beams.

The beams should be placed 16.58 feet from either side of the origin.

Step 6: Graph of Cable and Strut.

Refer to the attached image(s).

Step 7: Algebraic Intersection of Cable and Strut.

To find the point of intersection, set the two given equations (from model 2) equal to each other and solve for 'x.'

[tex]y=\sqrt{2x+8} \ \text{and} \ y=x-8\\ \\\\\\\Longrightarrow \sqrt{2x+8}=x-8 \\\\\\\\\Longrightarrow 2x+8=(x-8)^2 \\\\\\\\\Longrightarrow 2x+8=x^2-16x+64\\\\\\\\\Longrightarrow x^2-18x+56=0\\\\\\\\\Longrightarrow (x-14)(x-4)=0\\\\\\\\\therefore x=\{14,-4\}[/tex]

In order to determine which value of 'x' is correct we must verify the solution.

When x = 14:

[tex]\Longrightarrow 2(14)+8=(14-8)^2\\\\\\\\\Longrightarrow 36=36 \checkmark[/tex]

When x = -4:

[tex]\Longrightarrow 2(-4)+8=(-4-8)^2\\\\\\\\\Longrightarrow 0\neq 144[/tex]

Thus, the correct x-value is 14. Plug this into either given equations and solve for 'y.'

[tex]\Longrightarrow y =x-8\\\\\\\\\Longrightarrow y =14-8\\\\\\\\\therefore y=6[/tex]

Thus, the point of intersection is (14, 6).

Step 8: Graph of Two Struts.

Refer to the attached image(s).

Step 9: Algebraic Solution for Beam Placement.

To find the x-value of the beam placement, you need to find the point where the two strut equations are 2 feet apart. Set up an equation using the given functions and solve for 'x.'

[tex]\Longrightarrow y=\sqrt{x+8}-\sqrt{x-4}; \ y=2\\\\\\\\\Longrightarrow 2=\sqrt{x+8}-\sqrt{x-4}\\\\\\\\\Longrightarrow 2+\sqrt{x-4}=\sqrt{x+8}\\\\\\\\\Longrightarrow 4\sqrt{x-4}+x=x+8\\\\\\\\\Longrightarrow 4\sqrt{x-4}=8\\\\\\\\\Longrightarrow \sqrt{x-4}=2\\\\\\\\\Longrightarrow x-4=4\\\\\\\\\therefore \boxed{\boxed{x=8}}[/tex]

Step 10: Placement of Beam.

The beams will need to be placed 8 feet from either side of the origin.

She have 1 hour 17 minutes remaining for the second section.

what is total time ?

Time can be defined as an ongoing and continuous sequence of events that occur in succession, from past through the present, and to the future. Time is used to quantify, measure, or compare the duration of events or the intervals between them, and even, sequence events.

Given:

Total time : two hours

Time taken to complete the first section =  forty-three minutes

Now , minutes she have remaining on the second section

= Total time - Time taken to complete the first section

= 2 hours - 43 minutes

= 1 hour 17 minutes

Hence , she have 1 hour 17 minutes remaining for the second section.

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A possible length, in inches, of the third side is equal to 4 inches.

In Euclidean geometry, the Triangle Inequality Theorem states that the sum of any two sides of a triangle must be greater than or equal (≥) to the third side of the triangle.

Mathematically, the Triangle Inequality Theorem is represented by this mathematical expression:

b - c < n < b + c

Where:

n, b, and c represent the side lengths of this triangle.

By applying the Triangle Inequality Theorem, the possible side lengths of the triangle's third side is given by:

b - c < n < b + c

7 - 4 < n < 7 + 4

3 < n < 11.

Therefore, n could be 4, 5, 6, 7, 8, 9, and 10 inches.

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The intervals on which the function is increasing is (0, 1). Option D

A polynomial is a type of mathematical expression that has variables that are raised to whole number powers.

Since the factors of 5 are 1 and 5, we'll try to factor the polynomial by assuming that (x-1) and (x-5) are factors.

The product of (x-1) and (x-5) is (x² - 6x + 5), which is the polynomial we're given.

⇒ (x² - 6x + 5) is the factored form of the polynomial.

A polynomial is increasing on the intervals where it's greater than zero. So we just need to look at the sign of (x² - 6x + 5) for values between 1 and 5.

For values between 1 and 5, the function is always positive, so it's increasing on the interval (1, 5). Therefore, the increasing interval is (1, 5).

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The closet square inch that is needed to cover the cuboid is 208 inches ( option A)

A cuboid is defined as a three-dimensional shape, that has six rectangular faces, eight vertices and twelve edges.

The surface area of cuboid is given as;

SA = 2(lb+lh+bh)

lb = 33/4 × 4 = 33 in

lh = 23/4 × 4 = 23 in

bh = 23/4 × 33/4 = 759/16

SA = 2( 23+33+759/16)

SA = 46+66+47.44

SA = 207 in

therefore the closet square inches is 208 in²

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