What is the answer to 2(5x+4)=8

First lets open parenthesis using the distributive property. So we multiply everything in the parenthesis by 2. 5x*2 = 10x. 4*2 = 8. So we have 10x + 8 = 8. We subtract 8 from both sides and we get 10x = 0. So we divide both sides by 10 and 0/10 = 0. x=0. So the answer to x is

x = 0

Step-by-step explanation:

2(5x+4)=8

2×5x + 2×4 = 8

10x +8 =8

Collect like terms

10x= 8-8

10x = 0

Divide both sides of the equation by 10

x = 0

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240

answer: entity is prob the answer

step-by-step explanation: