Need help solving for x and y :) really need help

x = 11, y = 9

Step-by-step explanation:

To solve for x, set the sides equal to each other:

7x + 27 = 10x - 6

Add 6 to both sides:

7x + 33 = 10x

Subtract 7x from both sides:

33 = 3x

Divide both sides by 3:

11 = x

(Which is the same as x = 11)

Now, to solve for y, since they don’t give you the other side, you know that the straight line is 180° so:

7x + 27 + 9y - 5 = 180

Plug in your x:

7(11) + 27 + 9y - 5 = 180

77 + 27 + 9y - 5 = 180

Add like terms:

99 + 9y = 180

Subtract 99 from both sides:

9y = 81

Divide both sides by 9:

y = 9

Hope this helps!

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or  

(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