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3 years ago

can you help me evaluate this: 7m + 14m - 6n - 5n + 2m. why do you add 6n with 5n instead of subtract?

Mathematics

1 answer:

Mademuasel [1]3 years ago

6 0

Step-by-step explanation:

The reason is because it is not just 6 it is - 6 so when there are two negative numbers they don't subtract they add if it was 6n then it was to be subtracted

21m - 11n + 2m

23m - 11n

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What is the volume of a hemisphere with a radius of 2.1 m, rounded to the nearest tenth of a cubic meter?

Art [367]

Answer:

The volume of hemisphere is 19.4 cubic meter.

Step-by-step explanation:

Given:

A hemisphere is with a radius of 2.1 m.

Now, to find the hemisphere volume with radius 2.1 m.

$Radius\ (r) = 2.1 m.$

So, we put formula to get the volume of hemisphere:

$Volume=\frac{2}{3} \pi r^3\ \ \ \ \ (Taking\ the\ value\ of\ \pi =3.14)\\\\Volume=\frac{2}{3} \times 3.14\times 2.1^3\\\\Volume=\frac{2}{3} \times 3.14\times 9.26\\\\Volume=19.384\ cubic\ meter.$

Hence, the rounded to the nearest tenth of a cubic meter is 19.4 cubic meter.

Therefore, the volume of hemisphere is 19.4 cubic meter.

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3 years ago

24. Laisha paid for her and a friend to go to the movies. She

sammy [17]

Answer:

$26.91

Step-by-step explanation:

9.50 +13.93 =23.43

50.34 - 23.43 = 26.91

4 0

3 years ago

5p/-1 + q when p is 21 and q is 9

son4ous [18]

5×21/-1+9
105/-1 +9
-105 +9
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hope that helps

8 0

3 years ago

What is the least common factor of 60,66

Ilia_Sergeevich [38]

Answer:3

Step-by-step explanation: 60/6=10

66/6=11

60/3=20

66/3=22 you double the numbers of the quotient which halves the factor.

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3 years ago

Can someone rewrite the expression x^2 * x^-12 in the form of x^n. Pleasee

Ganezh [65]

Answer:

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Step-by-step explanation:

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4 years ago