The two rectangles havr the same area work out the value of x

x = 8 cm

Step-by-step explanation:

6 * 4 = 24

3 * x = 24

3 * 8 = 24

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

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value