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3 years ago

Write an expression to represent the sum of three times the square of a number and .

Mathematics

1 answer:

aleksklad [387]3 years ago

7 0

Answer:

3x^2-7

-7 is the constant

3 is the coefficient

x is the variable

Step-by-step explanation:

(3x^2)+(-7)

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A stage in the shape of a semi circle had a diameter of 42 ft. What is area of the stage? Use 22/7 for π. PLZ I NEED FAST TEST

zavuch27 [327]

A semi circle is half a full circle. Find the area of the full circle and divide it by 2.

Area of a circle = pi x r ^2

R is half the diameter

Area of full circle:

Area = 22/7 x 21^2

Area = 1386 sq. Ft

Area of stage = 1386/2 = 693 square feet

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3 years ago

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It takes jill 2 hours to run 14.5 miles. At this rate how far could she run in 3 hours?

grin007 [14]

Answer:

She can travel 21.75 miles in 3 hours.

Step-by-step explanation:

Firstly, you have to find out how many miles can Jill travel in 1 hour. So you divide it by 2 :

$2hr = 14.5miles$

$1hr \: = 14.5 \div 2 \\ 1hr = 7.25miles$

We have found out that she can travel 7.25 miles per hour. Next wr have to multiply it by 3 as the question says how far she run in 3 hours :

$1hr = 7.25miles$

$3hr = 7.25 \times 3 \\ 3hr = 21.75miles$

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3 years ago

47% of 8.4 million .....

FrozenT [24]

Answer:

39,48,000

Explanation:

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3 years ago

What number can be used to complete the volume statement for the cone below?

Allushta [10]

I’m sorry but there is no picture of the problem you would like me to solve.

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3 years ago

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Can someone help me draw this out to visualize it?

Vedmedyk [2.9K]

Answer:

Solution given:

South distance :base[b]=80milea

East distance :perpendicular [p]=35miles

Now

<S=?

we have

$\tan( \alpha ) = \frac{p}{b} = \frac{35 }{80}$

$\alpha = \tan {}^{ - 1} ( \frac{7}{16} )$

$\alpha = 23.629°$ =24°

24° bearing should be taken from south airport to East airport.

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3 years ago