4. For the three-step question that follows, provide your answer to each question in the given workspace. Identify each step with a coordinating response. Be sure to clearly label each part of yo response as Part A, Part B, and Part C.
Part A: Ava was asked to find the value of the expression 13t - 8r2 when t = -10 and r =
2. Her work is shown below, but she made a mistake. What was Ava's mistake?
13t - 8r2
13( - 10) - 80 - 2)
131 – 10) - 804)
130 - 8(4)
-138 - (4)
-552
Part B: Evaluate the expression correctly.
Part C: Show all of your work to support your answer to Part B.

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step-by-step explanation:

hi how are you doing today? if you ever need just tell me

step-by-step explanation:

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.