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3 years ago

What is a radius of this circle D=10

Mathematics

1 answer:

Orlov [11]3 years ago

5 0

THE RADIUS OF THE CIRCLE IS 15.7

To find the radius, we'll have to find, the CIRCUMFERENCE FIRST.

Circumference of a circle = π × Diameter

= π (3.14) × Diameter (10)

= 3.14 × 10

= 31.4

So, the circumference is 31.4

The RADIUS is HALF OF THE CIRCUMFERENCE.

Radius = 31.4 ÷ 2

= 15.7

THEREFORE THE RADIUS OF THE CIRCLE IS 15.7

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Plz help its 7th grade distributive proprty

Marat540 [252]

Answer:

a = 3.9

Step-by-step explanation:

Isolate the varible by dividing each side by factors that don't contain the variable.

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3 years ago

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Shaun needs to make mortar for brick-laying. It is made in the ratio 7:3 of sand to cement.

Tju [1.3M]

Sand to cement
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3 years ago

The length of a rectangle is 12 units longer than the width. The perimeter is 7 times the width. Find the length and the width o

katen-ka-za [31]

Log explanation below; answer is at bottom.

If the length, l, is 12 units longer than the width, w, then w = l - 12. If the perimeter, p,

p = 2l +2w,

is 7 x w, then

w = p/7

When two things are set equal to the same variable, they are equal to each other, so,

l - 12 = p/7

Now you need to get rid of the p so you are only working with one variable. To do this you plug in whatever p is equal to for p, so,

l - 12 = (2l + 2w)/7 now to get rid of the w do the same thing we did with p just for w. So,

l - 12 = (2l + 2(l - 12))/7

To solve this you want to multiply both sides by 7 first to get rid of the fraction.

7l - 84 = 2l + 2(l - 12)

Next you want to distribute the 2 over the l and the 12.

7l - 84 = 2l + 2l - 24

Next you want to combine like terms on each side.

7l - 84 = 4l - 24

Next add 84 and subtract 4l from sides to isolate the variable.

3l = 60

Now divide each side by 11 to get your answer.

l = 20.

To find the width,

w = l - 12

Just plug in and solve.

w = 20 - 12

w = 8

So your length and width are 20 and 8.

l = 20

w = 8

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3 years ago

Keelah's clothing store bicycles for $50 and then sells them for $80 what is the percent of markup on the price of the coat

kondaur [170]

Answer:

62.5%

Step-by-step explanation:

We can write a proportion. We know that $50 is the original value and $80 is the marked up price. We don't know the marked up percentage. Let's call it x. We write equal ratios of $\frac{x}{100}$ comparing percent and $\frac{50}{80}$ comparing the 50 to the marked up price. We then set them equal.