X ($30.50 + $12.00 +
$8.70)

51.2x

Step-by-step explanation:

follow the order of pemdas please excuse my dear aunt sally or parenthesis, exponents, multiplication, division, addition, and subtraction.

what you would want to do first is add everything that is inside the parenthesis: 30.50+12.00+8.70

then you multiply any number or variable that was outside of the parenthesis with the the number you got from adding what was inside the parenthesis in this case we have a variable: X

so what you would do is x(30.50+12.00+8.70)=

                                                   51.2

then multiply that by x and you will receive an answer of 51.2x

any variable times a number the answer is going to end with the variable at end of the number

false

step-by-step explanation:

4y - 6 + 4y^2 - 9

before simplifying this contains 4 terms

after simplifying

4y -15 + 4y^2

it contains 3 terms

1)is not similar since corresponding sides are not in the same ratio

2)are similar since corresponding sides are in the same ratio and corresponding angles are equal

hope it will

#faazmessi