Mr. Martínez asked his students to write a situation that could describe the relationship between all the
values of x and y in the table.
x 0 1 2 3
y 6 7 8 9
Which situation best describes the relationship
between all the values of x and y in the table?
A. Rachel had six dollars and then started to
save one dollar each week.
B. Beatriz ran one mile the first week and one
mile each week after that.
C. James read zero books in six months and
then started to read one book each week.
D. Marion has six times the number of toy trains
that Tony has.

the bottom of the spinner is not flat.

step-by-step explanation:

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

answer: what are the following choices

(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