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Dominik [7]
3 years ago
15

80% of x is equal to 100. Find x.

Mathematics
2 answers:
ololo11 [35]3 years ago
7 0
The number is 125 and the equation is 0.8x = 100
Step-by-step explanation:
80% of x is equal to 100.
Write an equation that shows the relationship of 80%, x, and 100
80% = 0.8
0.8x = 100
x = 100/0.8
x = 125
The number is 125 and the equation is 0.8x = 100
xeze [42]3 years ago
5 0

The number is 125 and the equation is 0.8x = 100

Step-by-step explanation:

80% of x is equal to 100.

Write an equation that shows the relationship of 80%, x, and 100

80% = 0.8

0.8x = 100

x = 100/0.8

x = 125

The number is 125 and the equation is 0.8x = 100

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Find the surface area and the volume of the figure <br> Round to the nearest tenth if needed.
elixir [45]

Answer:

  • See below

Step-by-step explanation:

<u>Surface area:</u>

  • S = 2(lw + lh + wh) + 2πrh
  • S = 2(9*4 + 9*5 + 4*5) + 2*3.14*2*3 = 239.7 cm² (rounded)

<u>Volume:</u>

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4 0
2 years ago
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If 5/9 of a tank can be filled in 2 minutes how many minutes will it take to fill the whole tank
asambeis [7]

Answer:

3 3/5 minutes

Step-by-step explanation:

Let one measure of volume be 5/9 of a tank, or (5/9)(tank).

We're interested in filling the whole tank, which we represent by (1)(tank) or (9/9)(tank.

Write and solve an equation of ratios:

 (5/9) (tank)        2 minutes

------------------- = ----------------

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Solve for x, which represents the number of minutes required to fill the whole tank:

(5/9)(x) = (9/9)(2), or (after simplifying) 5x = 18, or x = 18/5 (3  3/5 minutes)

The whole tank will be filled in 3  3/5 minutes.

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Answer:

Step-by-step explanation:

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Right isosceles triangles are constructed on the sides of a 3−4−5 right triangle, as shown. A capital letter represents the area
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Answer:

1

Step-by-step explanation:

because the triangles are isosceles, that means that the area of Z is 5x5x1/2, which equals 12.5

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