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natali 33 [55]
3 years ago
15

Which pair of ratios form a proportion?

Mathematics
2 answers:
Roman55 [17]3 years ago
7 0
Your answer is B::))


Tpy6a [65]3 years ago
6 0
It is 8:12 and 18:27 because both equals 2/3
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7 less than a number k is 18​
Elena-2011 [213]

Answer:

k-7=18; k=25

Step-by-step explanation:

k(-7+7)=18+7\\18+7=25\\k=25

7 less than 25 (or K) is 18.

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Abbie spent 5/8 of her money and saved the rest. If she spent $45. how much money did she have at first?
shutvik [7]
She had 80 dollars at first.80/80 equals to 8/8 and that equals to 64 dollars. 5/8 equals to 45
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Answer for number 12
aalyn [17]

Answer:

12 a. 4605 feet 12 b. 1,459,063 square feet

Step-by-step explanation:

For the perimeter, we simply add the lengths of each of the 5 sides together (or multiply 5 times one side length).

P = 5(921)

P = 4605 feet

For the area, we will use composition...add the area of the triangle to the area of the trapezoid.

For the area of the triangle, the formula is

A=\frac{1}{2}bh.

Filling in our values gives us

A=\frac{1}{2}(1490)(541) and

A = 403,045 square feet.

Now for the trapezoid.  The formula for a trapezoid is

A=\frac{1}{2}(b_{1}+b_{2})(h)

where the b's represent the bases and the h represents the height.  Filling in our values gives us

A=\frac{1}{2}(921+1490)(876)

Work inside the parenthesis first:

A=\frac{1}{2}(2411)(876) and

A = 1,056,018

Now we add those together to get that area of the Pentagon is 1,459,063 square feet

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The answer would be A or D
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If you buy something at a 20% discount off the listed price of $ 97, but pay a sales tax of 10% after the discount is applied, h
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