B, x=12 because 140-80=60, 60/5=12
They give us the length of side of the square which is 3-7x.
To get an expression for the perimeter that is expressed as a product we have to multiply the expression 3-7x by four since every square has four sides. This will give us an expression of 4(3-7x). We than can use the distributive property to multiply everything inside the parenthesis by 4. This will give us an expression of 12-28x.
Step-by-step explanation:
Hope it helps you!!
#IndianMurga
Answer:
0.51
Step-by-step explanation:
0.55 - (0.9 - 0.8) x 4
0.55 - 0.1 x 4
0.55 - 0.4
0.51
