Which of the following is not always true? a square is a rhombus a rectangle is a parallelogram a rhombus is a square a square is a rectangle

A square is a rectangle

Step-by-step explanation:

Not every rectangle is a square, to be a square its sides must have the same length.

answer:      

step-by-step explanation:

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10