MATHEMATICS HIGH SCHOOL

Identify whether the given value of the variable makes the equation true. –5r – 6 = –26; r = 4

A.false

B.true

Answers

Answer 1
Answer: - 5 r - 6 = - 26       for r = 4

- 5 * ( 4 ) - 6 = - 26

- 20 - 6 = - 26

- 26 = -26 

B) true 

hope this helps!

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4x-6=x+9
Solve the equation show all steps

Answers

Answer:

x= 5

Step-by-step explanation:

4x-6=x+9

Move the -6 to the other side of the equation by adding 6 to each side.

4x-6 + 6 =x+9 + 6

4x = x+15

Now move the x on the right side of the equation to the left side of the equation by subtracting x from each side.

4x - x = x + 15 - x

3x = 15

Now to isolate the x, divide both sides of the equation by 3.

3x/3 = 15/3

x = 5

Check your answer by substituting x = 5 into the original equation:

4x-6=x+9

4(5) - 6 = 5 + 9

20 - 6 = 14

14 = 14 >>> so this answer, x=5, is correct.

Simplify (3x-7)squared

Answers

9x^2-42x+49... Sorry if I'm too late!

Which of the following is the solution to (x-13)<18

Answers

Answer:

The solution to the equation (x-13)<18 is that x can be equal to the numbers 0-17 (NOT including negative numbers)

24+ =120÷3
what's supposed to be in the space?

Answers

so first you simplify
24+x=120/3
120/3=40
24+x=40
subtract 24 from both sides
x=16
120/3= 40
40-24=16

16 is in the blank space

What’s the answer for b. Please help this is due in a couple hours!!

Answers

Answer:4, -28, and -5

Step-by-step explanation:

Simply you input 3 for x in the equation, so 4(3)-8

12-8= 4

Next is -5 so again 4(-5)-8

-20-8=-28

Lastly 3/4 so 4(3/4)-8

3-8=-5

(3 pt) Which shows the dimensions of two rectangular prisms that have volumes of 320 mm3 but different surface areas? A. 16 mm by 5 mm by 4 mm; 5 mm by 4 mm by 16 mm B. 10 mm by 4 mm by 6 mm; 6 mm by 10 mm by 4 mm C. 8 mm by 10 mm by 4 mm; 10 mm by 8 mm by 4 mm D. 8 mm by 10 mm by 4 mm; 20 mm by 8 mm by 2 mm

Answers

D. 8 mm by 10 mm by 4 mm
    20 mm by 8 mm by 2 mm

8 x 10 x 4 = 320 mm
20 x 8 x 2 = 320 mm
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