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Choose only two words from the box above to make this statement correct.
8y is a in the7x + 8y

Term

Expression

Step-by-step explanation:

8y is a term in the expression

7x + 8y

There are two terms in the expression 7x + 8y

First is 7x

Second is 8y

7 and 8 are coefficient of x and y respectively

7x+8y is an expression because there is no equality sign(=), it doesn't equate to any value.

Unlike an equation that has the Equal to sign(=)

There are three basic types of expression:

1. Arithmetic expression

2. Character expression

3. Logical or relational expression

(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: y = -2.5x - 15

              (-6,0)

step-by-step explanation: