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2 years ago

9

Claire has received scores of 85, 88, 87, and 80 on her algebra tests. what is the minimum score she must receive on the fifth

test to have an overall test score average of at least 82 ?

1 answer:

algol [13]2 years ago

5 0

85+88+87+80+x/5=82

340+x=410

410-340=70

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3 years ago

What is the approximate area of the shaded portion of the diagram? (Use 3.14 as an estimate for pi.)

Nadusha1986 [10]

Answer:

218

Step-by-step explanation:

first find the area of the circle-

$A=\pi r^{2} \\A=\pi 10^{2} \\A=100\pi \\A=314$

to find the area of the triangle, we need the base and the height. The base we know is 16, since we don't know the height yet, use the Pythagorean theorem to find the height. One leg is 16 the hypotenuse is 20 (2* the radius).

$a^{2} +b^{2} =c^{2} \\a^{2} +16^{2} =20^{2} \\a^{2} +256=400\\a^{2} =144\\a=12$

Now I know the height is 12. Find the area of the triangle

$A=\frac{1}{2} bh\\A=\frac{1}{2} (16)(20)\\A=96$

subtract the area of the triangle from the area of the circle

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2 years ago

What is 10 times as much as 1.0

sveta [45]

10 times 1.0 is 10 itself
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3 years ago

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3 years ago

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A square postage stamp has area 1280 mm. About how long is each side?

Afina-wow [57]

Answer:

Each side is 35.78 mm

Step-by-step explanation:

A square would have 4 equal sides. Since area of a square is x^2, where x is one side, we can write:

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Each side is 35.78 mm

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1 year ago