I need help with the perimeter ASAP! The floor of a small bedroom is made up of 140 square tiles. Each tile measures 20cm on the side.

how large is the floor area of ​​the bedroom?

529 and 531

step-by-step explanation:

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign

144.50

step-by-step explanation:

21.5 x 13.4=288.10 divide by 2

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