Urgent needed with these two! will give brainliest to the correct answer only!

Question 10:

Step 1: For the equation to be parallel to y = 2x + 7, the slope has to be the same.

Step 2: After finding part of our equation (i.e. y = 2x + b), we have to find b by plugging in the points: (-4, 7).

Step 3: Write the final equation.

The answer is y = 2x + 15.

Question 11:

Step 1: For the equation to be parallel to y = 2x + 7, the slope has to be the same.

Step 2: After finding part of our equation (i.e. y = 2x + b), we have to find b by plugging in the points: (-4, 7).

Step 3: Write the final equation.

The answer is y = 2x + 15.

b

step-by-step explanation:

the word superfluous means unnecessary

(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