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3 years ago

There are 90 total days in winter. If it snowed on 30% of the days, on how many days of winter did it snow?

Mathematics

2 answers:

olganol [36]3 years ago

7 0

Answer:

27 days

Step-by-step explanation:

Well, there's two ways we could do this (which I do). One way is easier with a calculator, one is useful when you cannot use a calculator.

EASY CALCULATOR METHOD

30% as a decimal is 0.3, so if you multiply 90 by 0.3, you can easily find 30%. So:

90 x 0.3 = 27 days.

NON CALCULATOR METHOD

To find 10% of something, we divide the original value by 10. Therefore, we just need to find 10% and multiply that value by 3 to get 30%. So:

90/10 = 9 days (10%)

9 x 3 = 27 days (30%)

Either way both give you the same answer of 27 days.

Artemon [7]3 years ago

4 0

Answer:

Step-by-step explanation:

30%=0.3 in decimal form

90×0.3=27

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Alex17521 [72]

Answer:

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Step-by-step explanation:

Solve for x:

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Hint: | Solve the quadratic equation by completing the square.

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x^2 - 12 x = -20

Hint: | Take one half of the coefficient of x and square it, then add it to both sides.

Add 36 to both sides:

x^2 - 12 x + 36 = 16

Hint: | Factor the left hand side.

Write the left hand side as a square:

(x - 6)^2 = 16

Hint: | Eliminate the exponent on the left hand side.

Take the square root of both sides:

x - 6 = 4 or x - 6 = -4

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Add 6 to both sides:

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Hint: | Look at the second equation: Solve for x.

Add 6 to both sides:

Answer: x = 10 or x = 2

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svp [43]

We have that AB || DC.

By a similar argument used to prove that AEB ≅ CED,we can show that (AED) ≅ CEB by (SAS) . So, ∠CAD ≅ ∠ (ACB) by CPCTC. Therefore, AD || BC by the converse of the (
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Leokris [45]

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tresset_1 [31]

Answer:

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Step-by-step explanation:

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