I need help, thanks.

63

Step-by-step explanation:

the area is 43cm²

Step-by-step explanation:

First, you find the area of the left side. 7cm - 3cm= 4cm

Secondly, you multiply 4cm x 4cm = 16cm

Then, you find the area of the bottom bit. 9cm x 3 cm = 27cm

Lastly, you add 27cm + 16cm, which brings your answer to...

43cm² :-)

(It's squared because you are finding the area)

for b its (t) and c its (d)

step-by-step explanation:

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15