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Nina [5.8K]
3 years ago
5

Evaluate 2r +1 if r=3

Mathematics
1 answer:
Evgesh-ka [11]3 years ago
6 0

Answer:

7

Step-by-step explanation:

So, substitute in your 4 for r, 2(3) + 1. Multiply 2 and 3 to get 6 and then add a to get 7. I hope this helps :)

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The formula for the volume V of a cylinder is , where r is the radius of the base and h is the height of the cylinder. Select th
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Answer:

<h2>h = 4 cm</h2><h2 />

Step-by-step explanation:

V = π r² h

where r = 3 cm

V = 36π cm³

solve for h

plugin values into the formula:

36π = π 3² h

h = <u> 36π </u>

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3 years ago
When Jeremy surveyed thirty 7th-grade students at the community pool, he found that 2/15 had not read at least one book during J
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.....Jeremy did not make a good inference. The ratio is not in proportion to 2/15. The correct inference would be about 26 students who did not read any books in July. The sample might be biased since it was limited to those at the pool....

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4 years ago
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of the 200 seniors graduating, 50 took an art class while in highschool and 99 were in the band . Only 30 of the students who to
elena-s [515]

Answer:

69 or 71, read below for details.

Step-by-step explanation:

This is unfinished, but I'll answer to my best ability.

200 seniors graduated

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8 0
3 years ago
(8y²)(-3x²y²)(2/3xy⁴)<br><br> HELP PLEASEEEEEEEE
IRINA_888 [86]

Step-by-step explanation:

1 Remove parentheses.

8{y}^{2}\times -3{x}^{2}{y}^{2}\times \frac{2}{3}x{y}^{4}

8y

2

×−3x

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y

2

×

3

2

xy

4

2 Use this rule: \frac{a}{b} \times \frac{c}{d}=\frac{ac}{bd}

b

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×

d

c

=

bd

ac

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\frac{8{y}^{2}\times -3{x}^{2}{y}^{2}\times 2x{y}^{4}}{3}

3

8y

2

×−3x

2

y

2

×2xy

4

3 Take out the constants.

\frac{(8\times -3\times 2){y}^{2}{y}^{2}{y}^{4}{x}^{2}x}{3}

3

(8×−3×2)y

2

y

2

y

4

x

2

x

4 Simplify 8\times -38×−3 to -24−24.

\frac{(-24\times 2){y}^{2}{y}^{2}{y}^{4}{x}^{2}x}{3}

3

(−24×2)y

2

y

2

y

4

x

2

x

5 Simplify -24\times 2−24×2 to -48−48.

\frac{-48{y}^{2}{y}^{2}{y}^{4}{x}^{2}x}{3}

3

−48y

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y

2

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4

x

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x

6 Use Product Rule: {x}^{a}{x}^{b}={x}^{a+b}x

a

x

b

=x

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.

\frac{-48{y}^{2+2+4}{x}^{2+1}}{3}

3

−48y

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x

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7 Simplify 2+22+2 to 44.

\frac{-48{y}^{4+4}{x}^{2+1}}{3}

3

−48y

4+4

x

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8 Simplify 4+44+4 to 88.

\frac{-48{y}^{8}{x}^{2+1}}{3}

3

−48y

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x

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9 Simplify 2+12+1 to 33.

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3

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x

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10 Move the negative sign to the left.

-\frac{48{y}^{8}{x}^{3}}{3}

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3

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8

x

3

11 Simplify \frac{48{y}^{8}{x}^{3}}{3}

3

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8

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-16{y}^{8}{x}^{3}

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ludmilkaskok [199]
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4 0
3 years ago
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