pls help
will give the brainliest!
Urgent!!
need explanation.​

Answer:

28

Step-by-step explanation:

if you do 7 + 7 + 7 + 7 that equals 28.

Answer:

0.09

Step-by-step explanation:

When you divide a number by 100, you move the decimal to the left 2 steps because there are two zeros.

Answer:

x and x+1

Step-by-step explanation:

x+4

x+1-2=x-1

So the quotient of the numbers is x+4/x-1

Answer:

49

Step-by-step explanation:

5^2 - 4(-3)(2)

5^2 - 4(-6)

25 - 4(-6)

25 - (-24)

49

Hope this helps!

49

25+24

you square 5 which is 25 than multiply -3 and 2 which is -6 than multiply by four

Answer:

The first one is 0, the second one is ARN (All real numbers)

Step-by-step explanation:

1. Anything raised to the "zeroth" power is always 1

2. Because 7 is being raised to the zeroth power, the number inside the parentheses becomes 1. Now x can equal anything, 1 times itself will always equal 1, no matter how many times you multiply them.

Equations can have one, zero or infinitely many solutions.

[tex](a)\ (6^2)^x = 1[/tex]

Express 1 as [tex]6^0[/tex]

[tex](6^2)^x = 6^0[/tex]

Express 0 as 2 x 0

[tex](6^2)^x = 6^{2 \times 0}[/tex]

Open the bracket

[tex]6^{2 \times x} = 6^{2 \times 0}[/tex]

Cancel out 6 on both sides

[tex]2 \times x =2 \times 0[/tex]

Divide both sides by 2

[tex]x =0[/tex]

Hence, the value of x is 0

[tex](b)\ (6^0)^x = 1[/tex]

Express [tex]6^0[/tex] as 1

[tex]1^x = 1[/tex]

Express [tex]1^x[/tex] as 1

[tex]1 = 1[/tex]

Both sides of the equation are the same

This means that:

x has infinitely many solutions

Read more about equations at:

https://brainly.com/question/10628783

Answer:

transitive property

Step-by-step explanation:

According to transitive property, if there is some relation between a and b by some rule , and then there same relation between  b and c by some rule, then

A and C are related to each other by some rule.

Example:

A = B

B=C

then by transitive property

A=C

As value of A and C are same that is B we can say that A is equal to C whose value is B.

_______________________________________________

Given

a =2z and 2z=b

here both c and b has value equal to Z , Thus, they follow transitive property.

Answer:

200

Step-by-step explanation:

Janet = x + 75

Kathy = x

2x + 75 = 325

2x = 325 - 75

2x = 250

x/Kathy = 125

x + 75/Janet = 125 + 75

= 200

Question

Suppose the following facts to be true: The probability of a random kindergartener having chicken pox at any given time is 2%. Among kindergarteners who have chicken pox, 75% have red spots. Among kindergarteners who do not have chicken pox, 1% have red spots. Given that Sanjay, a kindergartener, has red spots, what is the probability that Sanjay has chicken pox? Enter your answer as a fraction in simplified form.

Answer:

75/124

Step-by-step explanation:

This is a question based on conditional Probability

We would solve this using Bayes's Theorem of Conditional Probability

From the above question, we have the following information:

The probability of a random kindergartener having chicken pox at any given time is 2%.

Hence, the probability that a kindergartner would not have chicken pox

= 100% - 2%

= 98%

Kindergarteners who have chicken pox, 75% have red spots.

Kindergarteners who do not have chicken pox, 1% have red spots.

The Sanjay, a kindergartener, has red spots, the probability that Sanjay has chicken pox is calculated as:

= (Probability of a random kindergartener having chicken pox at any given time ⋂ Probability of kindergarteners who have chicken pox, and have red spots)/ [(Probability of a random kindergartener having chicken pox at any given time ⋂ Probability of kindergarteners who have chicken pox, and have red spots) + (Probability Kindergarteners who do not have chicken pox and have red spots ⋂ Probability that a kindergartner would not have chicken pox)

= (2% × 75%)/[(2% × 75%) +( 1% × 98%)]

= 150/150 + 98

= 150/248

= 75/124

Area of a square game board = 179 inches ²

Calculate the side of given square game board.

Area of square = ( Side )²

We know that,

Area of square = ( Side )²

★ Substituting the value in the above formula, we get :

=> 179 = ( Side )²

=> Side = √179

=> Side = 13.37 inches ( approx )

Answer:

13.38 in

Step-by-step explanation:

The area of a square can be found using the following formula.

[tex]a=s^2[/tex]

where a is the area and s is the side length.

We know that the area of the square is 179 in^2. We can substitute that value in for a.

[tex]179 in^2=s^2[/tex]

We want to find the side length. Therefore, we have to isolate the variable, s.

s is being squared. The inverse of a square is the square root. Take the square root of both sides of the equation.

[tex]\sqrt{179 in^2}=\sqrt{s^2}[/tex]

[tex]\sqrt{179 in^2}=s[/tex]

[tex]13.3790882 in =s[/tex]

We want to find the approximate side length. Round to the nearest hundredth. The 9 in the thousandth place tells us to round the 7 to a 8,

[tex]13.38 in= s[/tex]

The side length of the board game is about 13.38 inches.

Answer:

72

Step-by-step explanation:

13-5=8^2

16/2=8

(8*8)+8

64+8

=72

Answer: [tex]72[/tex]

Subtract

[tex](13-5)^2\\=8^2[/tex]

Multiply

[tex]8^2=64\\8*8=64[/tex]

Divide

[tex]16/2=8[/tex]

Add

[tex]64+8=72[/tex]

Answer: variability between means increases relative to the variability within groups

Step-by-step explanation:

The formula to calculate F-ratio : variance between groups divided by variance within groups

Here, F-ratio [tex]\propto[/tex] is proportional to variance between groups but inversely proportional to variance within groups .

So, F-ratio increases when variability between means increases relative to the variability within groups.

Answer:

[tex]-16[/tex]

Step-by-step explanation:

[tex]12-16[/tex]

We can first look at the number that is higher.

[tex]16[/tex]

16 is negative because it is the number that is higher and is being subtracted from 12.

So your answer is

[tex]-16[/tex]

Answer:

-18, -23, -28

Step-by-step explanation:

It looks like it is going down by -5

-18, -23, -28. Just subtract by 5 every time

Answer:

297 miles

Step-by-step explanation:

cost = 0.78 cents per mile + base fee

y = 0.78x + 15.88

247.65 = 0.78x + 15.88

subtract 15.88 from both sides

231.77 = 0.78x

divide by 0.78 on both sides

x = 297.14120256

297 miles

Answer:

297.1410256 = m

Step-by-step explanation:

charge = 15.88 + .78m where m is the miles driven

247.65 = 15.88 + .78m

Subtract 15.88 from each side

247.65-15.88 = .78m

231.77 = .78m

Divide each side by .78

231.77/.78 = m

297.1410256 = m

Answer:

$1,170

Step-by-step explanation:

Area around the pool = 20 x 30

Pool = 12 x 24

Carpet is sold $1.95 by square foot

Use formula A = bh

Plug it in: A = 20 x 30

So they need 600 sq ft of carpet.

Multiply 600 by 1.95 to get 1170

The total cost = $1,170

Answer:

$608.40

Step-by-step explanation:

Dimensions of pool: 12 ft by 24 ft

Dimensions of pool & cement walkways: 20 ft by 30 ft

The pool is a rectangle that sits inside the walkways. The area of the walkways (AW) is the area of the pool & walkways (the 20 ft by 30 ft rectangle) minus the area of the the pool (the 12 ft by 24 ft rectangle). Once we know the area of the just the walkways (AW), we multiply it by the price of the carpet too find the cost of the carpet.

area of walkways = area of pool & walkways - area of pool

AW = 20 ft * 30 ft - 12 ft * 24 ft

AW = 600 ft^2 - 288 ft^2

AW = 312 ft^2

The area of the walkways alone is 312 ft^2. Now we multiply it by the unit cost of carpet to find the cost of the carpet needed for the walkways.

cost = AW * unit rate

cost = 312 ft^2 * $1.95/ft^2

cost = $608.40

Answer:

$0.45

Step-by-step explanation:

$5.40/12 = $0.45

If A 12-pack of Cokes costs $5.40 then each Coke costs $0.45.

Ratio basically compares quantities, that means it shows the value of one quantity with respect to the other quantity.

If a and b are two values, their ratio will be a:b.

Given that,

Cost of 12- pack of Cokes = $5.40.

To find the cost of one Coke cost,

Use ratio property,

12 packs of cakes = $5.40
1 pack of cakes = 5.40/12

1 pack of cake = 0.45

The price of one pack of cake is $0.45

To learn more about Ratio on :

https://brainly.com/question/13419413

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Answer:

60 square feet

Step-by-step explanation:

area= length*width

a=5*12

a=60

Answer: 60 ft²

Step-by-step explanation: To find the area of the rectangular bedroom wall, we use the formula for the area of a rectangle, A = lw.

Since the length of the rectangle is 12 feet and the width of the rectangle

is 5 feet, we plug this information into the formula for length and width

and we have (12 ft)(5 ft) which simplifies to 60 ft².

So the area of the rectangular bedroom wall is 60 ft².

Answer:

x = [tex]\frac{y-1}{4}[/tex]

Step-by-step explanation:

Given

y = 4x + 1 ( subtract 1 from both sides )

y - 1 = 4x ( divide both sides by 4 )

[tex]\frac{y-1}{4}[/tex] = x

Answer: 12

Step-by-step explanation: In this problem,

we first determine the absolute value of -4.

The absolute value of -4 is 4 so we have 3(4) which is 12.

Answer:

12%

Step-by-step explanation:

Cost Price of the MP3 player =$150

Sales Tax = 8 %

Total sales tax=  Tax * Cost Price

                   =   [tex]\frac{8}{100} * 150[/tex]

                   =12%                  

He payed a total of 12% sales tax

Answer: B. 33.1

Step-by-step explanation:

Use sin to solve (opposite/hypotenuse)

let x= length of CV

sin(37)=x/55

x=55sin(37)

x≈33.1

Answer:

(a) 7.5 seconds

(b) The horizontal distance the package  travel during its descent is 1737.8 ft

Step-by-step explanation:

(a) The given function for the height of the object is s = -16·t² + v₀·t + s₀

The initial height of the object s₀ = 900 feet

The initial vertical velocity of the object v₀[tex]_y[/tex] = 0 m/s

The time it takes the package to strike the ground is found as follows;

0 = -16·t² + 0×t + 900

900 = 16·t²

t² = 900/16 = 62.25

t = √62.25 = 7.5 seconds

(b) Given that the horizontal velocity of the package is given as 158 miles/hour, we have

158 miles/hour = 231.7126 ft/s

The horizontal distance the package  covers in the 7.5 second of vertical flight = 231.7126 ft/s × 7.5 s = 1737.8445 feet = 1737.8 ft to one decimal place

The horizontal distance the package  travel during its descent = 1737.8 ft.

Answer:

Step-by-step explanation:

[tex]AB=\sqrt{(6-0)^2+(5-8)^2}=\sqrt{36+9}=\sqrt{45}=3\sqrt5\\\\BC=|-1-5|=|-6|=6\\\\CD=\sqrt{(-2-6)^2+(-4-(-1))^2}=\sqrt{64+9}=\sqrt{73}\\\\DE=\sqrt{(-5-(-2))^2+(3-(-4))^2}=\sqrt{9+49}=\sqrt{58}\\\\EA=\sqrt{(0-(-5))^2+(8-3)^2}=\sqrt{25+25}=\sqrt{25\cdot2}=5\sqrt2[/tex]

Answer:

total surface area = 936 in²

Step-by-step explanation:

total surface area  = surface area of the pyramid + surface area of the cube

1.  surface area of the pyramid = 4 * area of lateral triangle side

area of lateral triangle side = 12 * 9 /

area of lateral triangle side = 54 in²

2. surface area of the pyramid = 4 * 54

surface area of the pyramid = 216 in²

3. surface area of the cube = 5 * (12 x 12)

-surface area of the cube = 720 in²

therefore, the total surface area = 216 in² + 720 in²

total surface area = 936 in²

Answer:

C

Step-by-step explanation:

Please refer to the given picture (sorry, it's a rather bad drawing.)

Anyways, we know that the cube has side lengths of 12. Since the figure is a cube, all the side lengths are 12. Let's find the surface area of the cube first.

The cube has six faces. However, we only need to do five faces because one of the faces is the face that connects the cube to the pyramid. Because of this, we won't count it towards the surface area. Therefore, the total surface area of the cube would be:

[tex]5(bh)[/tex]

The bh represents the area of one face. The five multiplies that amount by five, giving us the surface area of the cube. Plug in 12 for the base and 12 for the height:

[tex]5(12)(12)=5(144)=720[/tex]

Therefore, the surface area of the cube (excluding one face) is 720 square inches.

Now, find the surface area of the square pyramid. The square pyramid is composed of four congruent triangles and one square base. Again, since the square base is connecting it to the cube, we won't count it. So, we only need to find the area of the four triangles and then add it to 720.

We are given that the height of the pyramid is 9. The base of all four triangles is 12 (since the side length of the cube is 12). However, to find the area, we first need to use the Pythagorean Theorem to determine x or the actual height of one of the triangles. We won't use 9 as the height because the 9 doesn't represent the height of the triangle, but rather of the pyramid. x is essentially the hypotenuse here. Thus:

Pythagorean Theorem:

[tex]a^2+b^2=c^2[/tex]

Plug in 9 for a, 12 for b, and x for c:

[tex]9^2+12^2=x^2\\x^2=81+144=225\\x=\sqrt{225}=15[/tex]

Therefore, the height of the triangles is 15. Now, we can use the area formula for triangles:

[tex]A=\frac{1}{2} bh[/tex]

The base is 12 and the height is 15. Thus:

[tex]A=\frac{1}{2}(12)(15)=6(15)=90[/tex]

And there are four of them, so the total surface area is:

[tex]4(90)=360[/tex]

Therefore, the total surface area of the composite figure (excluding the one face) is:

[tex](720+360)=1080\text{ in}^2[/tex]

Answer:

They will next toll together at  2 o'clock A.M.

Step-by-step explanation:

Given

Three Bells toll at regular interval of 15 minutes 16 minutes and 36 minutes respectively

They will ring together after time which will be LCM of 15, 16 and 36 minutes.

lets find LCM of 15,16,36

15 = 3*5

16 = 2*2*2*2 = 2^4

36 = 2*2*3*3 = 2^2 * 3^2

LCM is found by taking the highest power of each prime factor

highest powered value  of prime factors 2,3 and 5 is

5 is 5

2 is 2^4

3 is 3^2

thus, LCM = 2^4*3^2*5 = 16*9*5 = 720

Thus, they will ring together after 720 minutes

now

60 minutes = 1 hour

1 minutes = 1/60 hour

720 minutes = 720/60 hour = 12 hour.

Given that they rang together at  2 o'clock p.M

they will ring together after 12 hours at 2 PM

2 PM + 12 hours = 2 AM

Thus,

They will next toll together at  2 o'clock A.M.

Answer:

1) The equation in point and slope form is y - 56 = 3·(x - 17)

2) The above equation in slope and intercept form is y =  3·x + 5

3)  The height of the sidling when the botanist received it = 5 inches

4) The height of the tree on week 30 = 7 feet 11 inches

Step-by-step explanation:

The given parameters for the equation are;

The rate of growth of the young tree = 3 inches/week

The current height of the tree = 4 feet  8 inches = 56 inches

The current time since start of growth (time duration of growth) = 17 weeks

With the given information, we have;

The height of the tree, y = The dependent or y-variable

The time for the growth, x = The independent or x-variable

The slope = the rate of growth = 3 inches/week

At week, x = 17, y = 56 inches

1) The information presented in point and slope form is given as follows;

y - 56 = 3·(x - 17)

2) Simplifying the above equation to slope and intercept form, y = mx + c

Where;

m = The slope

c = The y-intercept

We have;

y = 3·x - 51 + 56 = 3·x + 5

y =  3·x + 5

Therefore the y-intercept = 5

3) The y-intercept = 5  which gives the value of the height of the tree at time x = 0 as follows;

At x = 0 when the tree was first received, the height of the tree, y = 3·x + 5 = 5 inches

4) On week 30, the height, y of the tree will be, y = 3 × 30 + 5 = 95 inches = 7 feet 11 inches.

Answer:

4a^2-20a+24+6y-9y^2

Step-by-step explanation:

The expression 4a^2-20a+24+6y-9y^2 can't be simplified further since the terms in this expression are unlike terms

Hope this helps ;) ❤❤❤

Answer:

x = 5

Step-by-step explanation:

Simplify. First, combine like terms:

3x - x + 2 = 12

(3x - x) + 2 = 12

(2x) + 2 = 12

2x + 2 = 12

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

PEMDAS =

Parenthesis

Exponents (& Roots)

Multiplication

Division

Addition

Subtraction

& is your order of operation.

First, subtract 2 from both sides:

2x + 2 (-2) = 12 (-2)

2x = 12 - 2

2x = 10

Next, divide 2 from both sides:

(2x)/2 = (10)/2

x = 10/2

x = 5

5 is your answer for x.

Check: Plug in 5 for x in the equation. Solve:

3(5) - (5) + 2 = 12

15 - 5 + 2 = 12

10 + 2 = 12

12 = 12 (True)

~

Answer:

x = 5

Step-by-step explanation:

Combining like terms, we get 2x = 10.  Dividing both sides by 2 yields

x = 5

Answer:

[tex]\frac{5}{8}[/tex]

Step-by-step explanation:

There are 24 hours in 1 day, thus 15 hours is

[tex]\frac{15}{24}[/tex] = [tex]\frac{5}{8}[/tex] of a day in simplest form