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3 years ago

In a sale, normal prices are reduced by 17%.

Mathematics

1 answer:

Misha Larkins [42]3 years ago

8 0

Answer:

<em>The sale price of the washing machine is £207.50.</em>

Step-by-step explanation:

<u>Percentages </u>

To find a percentage of a given number, the procedure is multiplying the percentage by the number and divide by 100.

Suppose the normal price of the washing machine was x before the discount. The discount is:

17% of x = 17/100 * x = 0.17x

This discount is given as £42.50, thus:

0.17x = £42.50

Solving:

x = £42.50/0.17

x = £250

The sale price is:

£250 - £42.50 = £207.50

The sale price of the washing machine is £207.50.

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kipiarov [429]

Answer:

Width = 6ft Area = 54 sq ft

Step-by-step explanation:

First, re-read the problem until you understand it and can put it into your own words. I re-wrote it like this: "Find the area of a rectangle by first finding the length (L) and the width (W)." [note that I added "find L and W," but that is how I'm going to solve the problem; I could also have said that we will need the formulas, P=2L+2W and A=LW, but you knew that already, right?).

Translate the problem:

"The length of a rectangle is 3 ft longer than its width" means

L = 3 + W (eq1)

"the perimeter of the rectangle is 30 ft" means

P = 30 (eq2)

So, now the math is easy, just find L and W so we can compute the area:

P = 30 = 2L + 2W (eq3; from eq2 and the formula for P)

30 = 2(3+W) + 2W (use eq1 to substitute for L)

30 = 6 + 2W + 2W (distribute)

30 = 6 + 4W (collect terms)

24 = 4W (subtract 6 from both sides)

6 ft = W (divide both sides by 4)

Use the easiest equation (either eq1 or else eq3) to find L:

L = 3 + W (eq1)

L = 3 + 6

L = 9 ft

What is the area (A)?

A = L*W

A = (9 ft)*(6 ft)

A = 54 sq ft

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3 years ago

At a restaurant the ratio of kids meals sold to adult meals sold was 7:3. If

Bezzdna [24]

Answer:

Step-by-step explanation:

because 35 divided by 5 is 7 and 15 divided by 15 is 3 making 7:3

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3 years ago

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Nostrana [21]

Assuming you mean this as your problem I hope I can assist you.
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Answer:

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago

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