Evaluate the expression 8+7​

Answer:

C

Step-by-step explanation:

Pythagorean theorem

A^2 + B^2 = C^2

Answer:

x = 8, x = 10

Step-by-step explanation:

[tex]\sqrt{4x - 31}[/tex] = x - 7 ( square both sides )

4x - 31 = (x - 7)² ← expand using FOIL

4x - 31 = x² - 14x + 49 ( sub 4x - 31 from both sides )

0 = x² - 18x + 80 ← in standard form

0 = (x - 8)(x - 10) ← in factored form

Equate each factor to zero and solve for x

x - 8 = 0 ⇒ x = 8

x - 10 = 0 ⇒ x = 10

As a check

Substitute these values into the equation and if both sides are equal then they are the solutions.

x = 8

left side = [tex]\sqrt{4(8)-31 }[/tex] = [tex]\sqrt{32-31}[/tex] = [tex]\sqrt{1}[/tex] = 1

right side = 8 - 7 = 1

Then x = 8 is a solution

x = 10

left side = [tex]\sqrt{4(10)-31}[/tex] = [tex]\sqrt{40-31}[/tex] = [tex]\sqrt{9}[/tex] = 3

right side = 10 - 7 = 3

Then x = 10 is a solution

Step-by-step explanation:

(18+12+15+19)÷5

64÷5

15

Answer:

15

Step-by-step explanation:

Answer:

15

Step-by-step explanation:

120 · 15% = 18

I hope this helps!!

Answer:

Hello! After reading your question I have deduced that the correct answer is 288² cm.

Step-by-step explanation:

The way I came to this conclusion was as follows:

Firstly:

If said rectangle is two squares put side by side (adjacent), then a valid assumption is that both squares are the same size.

This is because all four sides of a square have to be equal.

Thus if the two squares are joined together on one side, then all the other sides of both the squares will be the same length.

Thus both of the squares are going to be the same size, so they will have the same area.

Secondly:

If the area of one square is 144² cm then the area of the other square should also be 144² cm.

Thus if you combine the areas of both the squares, that make up the rectangle, you are left with the area of the rectangle being 288² cm.

I hope this helped!

Answer:

3

Step-by-step explanation:

jesushhhh

Answer:

Step-by-step explanation:

1. C

2. B

3. D

Answer:

(x-1) (x-4) is the answer

Answer:

Step-by-step explanation:

A) 3x - 9y > 27

x- intercept at y = 0 is:

y-intercept at x = 0 is:

Connect the two points (9, 0) and (0, -3) with dotted line (because of <) and shade below line (because y < ).

B)  (y-3) ≤ -4/3 (x+7)

Use one point from the equation:

Find the second point using the slope - 4/3, add 3 to x and - 4 to y:

Connect these two points (-7, 3) and (-4, -1) with solid line (because of ≤ ).

Shade the area below the line (because y ≤ ).

Answer:

21 min

Step-by-step explanation:

Answer:

y=3/5x+3

Step-by-step explanation:

3 is the y-intercept so that is the "b". To find the slope simply use rise/run.

Step-by-step explanation:

set up a proportion

12 patients. 96 patients

---------------- = ------------------

2 hours. ?

96 • 12 = 1152

1152 ÷ 2 = 576 hours

Answer:

16hours

Step-by-step explanation:

12=2

96=x

crossmultiply

12x=192

x=192÷12

x=16

Answer:

24 rows

Step-by-step explanation:

384 seats in total, and 16 chairs in a row, so 384/ 16=

24 rows

Hope this helps!

LMK if it does

Answer:

RST≈TSR FOR YOU PLAESE RANK ME HELPING HAND

Answer:

0.5 chance

Step-by-step explanation:

Likewise, the term "100-year storm" is used to define a rainfall event that statistically has this same 1-percent chance of occurring.

Answer:

0.5

Step-by-step explanation:

The possibility are very very very low, but never a no

Answer:

P = 15h

I hope it helps.

Answer:

4x+2

Step-by-step explanation:

(13x+x−53x)−(−43x+2)

Group all the same variables on each side.

(-39x)-(-43x+2)

-39x+43x+2

4x+2

Hope this helps :)

Answer:   x-2   &    -2-x+2x

Step-by-step explanation:

Answer: 84%

Step-by-step explanation:

Answer:

5/3 cups of flour

Step-by-step explanation:

3/1=5/x x representing the amount of water

cross multiply: 3x=5

divide by 3: x=5/3

Answer:

4+1=5

Step-by-step explanation:

Note down the below rules

Answer:  2x for x=3: 2(3) = 6.

Step-by-step explanation:

Answer:

51.9 miles

Step-by-step explanation:

distance  = speed * time

d = 59.3 * 7/8

d = 51.8875 miles

rounded

51.9 miles

Answer:

42.5 inches

Step-by-step explanation:

Ivan is 75 inches tall, and Logan would be half his size, 37.5 that is, if he were 5 inches shorter. That means logan is 42.5 inches.

Answer:

Logan is 42.5 inches

Step-by-step explanation:

half of Ivan is 37.5

Logan is 5 inches taller than 37.5 so 42.5

Hope this helps!

Let me know if it does and if the answer is right

Answer:

1.5 meters = 150 centimeters (multiply by 100)

Therefore, you should cut off [tex]225-150=75[/tex] centimeters.

Answer:

D. The coefficients are the same, and the constants are different

Step-by-step explanation:

This means that because we have the same coefficient (2/3), if we wanted the same equation, the constants (x +/- #) would have to be the same, and since they are not in this instance, that makes the equation false, and therefore has no solution

Answer:

0.3 inches

Step-by-step explanation:

2.5% = 0.025

The smallest frog is 12 * 0.025 inches, which is 0.3 inches.

Answer:

-1 = 2(-1 -1) = -4

0 = 2(0-1) = -2

1 = 2(1-1) = 0

2 = 2(2-1) = 2

Step-by-step explanation:

x = the number on the left column

for the middle colum, you need to do 2(x -1)

for the right column, you do : (x - 1) x 2)