GIVING OUT 25 POINTS FOR THIS EASYY QUESTION. IF YOU CAN ANSWER SIMILAR QUESTIONS LIKE THIS, I WILL BE GIVING YOU 50 POINTS!!

unable to determine

Step-by-step explanation:

A. quadratic

Step-by-step explanation:

Change in x      3       2       Change in y

6 - 3 = 3             6      3          3 - 2 = 1             Change in differences

9 - 6 = 3             9      6          6 - 3 = 3               3 - 1 = 2

12 - 9 = 3          12      11          11 - 6 = 5               5 - 3 = 2

15  12 = 3          15      18         18 - 11 = 7              7 - 5 = 2

The changes in x are all equal, 3.

The changes in y are not equal, 1, 3, 5, 7. This is not linear.

The changes in the differences in y are equal, 2. This is quadratic.

dude thats to long figure it

step-by-step explanation:

(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