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zimovet [89]
3 years ago
6

Amy and Stephanie were playing a number game. Amy picked a number and told Stephanie that if she added 9 to the number and multi

plied the sum by 3, it would equal 12. Which equation could Stephanie use to find the number, x?
A.
3(x) + 9 = 12

B.
3(x + 9) = 12

C.
3 + (x + 9) = 12

D.
9(x + 3) = 12
Mathematics
2 answers:
Fittoniya [83]3 years ago
5 0

Answer:

B

Step-by-step explanation:

add 9 then times 3

____ [38]3 years ago
3 0

Answer:

Step-by-step explanation:

B

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Find the area of the trapezoid below.
Pani-rosa [81]

Answer: 54 cm²

Step-by-step explanation: In this problem, we're asked to find the area of the trapezoid shown. A trapezoid is a quadrilateral with one pair of parallel sides.

The formula for the area of a trapezoid is shown below.

Area =\frac{1}{2} (^{b} 1 + ^{b}2)h

The <em>b's</em> represent the bases which are the parallel sides and <em>h</em> is the height.

So in the trapezoid shown, the bases are 6 cm and 12 cm and the height is 6 cm. Plugging this information into the formula, we have \frac{1}{2} (6 cm +12cm)(6 cm).

Next, the order of operations tell us that we must simplify inside the parentheses first. 6 cm + 12 cm is 18 cm and we have \frac{1}{2}(18 cm)(6 cm).

\frac{1}{2} (18 cm) is 9 cm and we have 9 cm · 6 cm of 54 cm²

So the area of the trapezoid shown is 54 cm².

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vodomira [7]

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Step-by-step explanation:

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madreJ [45]

Answer:

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