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2 years ago

Help ASAP, I’ll give brainliest Show work ty

Mathematics

1 answer:

Liula [17]2 years ago

6 0

Step-by-step explanation:

3(6+15)

=3(21)

=63

5[15-(6+1)]

=5(8)

=40

⅓(15)

⅓(6+15)

=⅓(21)

15/6

=2/1/2 or 2.5

2(6)(15-3)

=2(7)

=36

4(⅓+⅓+⅓)

=4(1)

6/15 - 15/6

=36/90 - 225/90

= -189/90

= -21/10

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Find the sum of the three expressions and choose the correct answer.

worty [1.4K]

$(-2u^3v + 5uv - 1) +(7u^3v - 2u^2v^2) +(5u^2v^2 - uv + 6)=\\\\ -2u^3v + 5uv - 1 +7u^3v - 2u^2v^2 +5u^2v^2 - uv + 6= \\ \\ (7u^3v-2u^3v)+(5u^2v^2-2u^2v^2)+(5uv-uv)+(6-1)=\\\\ \boxed{5u^3v+3u^2v^2+4uv+5}$

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3 years ago

Read 2 more answers

In a sample of 700 gas stations, the mean price for regular gasoline at the pump was $2.894 per gallon and the standard deviati

frez [133]

Answer:

$P(x < 2.892) = 4.36\%$

Step-by-step explanation:

Given

$N = 700$ --- Population

$\mu = 2.894$ -- Mean

$\sigma = 0.009$ --- Standard deviation

$n = 55$ -- Sample

Required: $P(x < 2.892)$

This question will be solved using the finite correction factor

First, calculated the z score

$z = \frac{x - \mu}{\sqrt{\frac{N -n}{N -1}} * \frac{\sigma}{\sqrt n}}$

$z = \frac{2.892 - 2.894}{\sqrt{\frac{700 -55}{700 -1}} * \frac{0.009}{\sqrt {55}}}$

$z = \frac{-0.002}{\sqrt{\frac{645}{699}} * \frac{0.009}{7.42}}$

$z = \frac{-0.002}{\sqrt{0.92} * \frac{0.009}{7.42}}$

$z = \frac{-0.002}{0.95917 * 0.0012129}$

$z = -1.71$

So:

$P(x < 2.892) = P(z < -1.71)$

Using z table

$P(x < 2.892) = 0.043633$

$P(x < 2.892) = 4.36\%$

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2 years ago

What is f(r) = 60 - 2/3 r when r =12?

7nadin3 [17]

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Substitute r for 12

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f(12) = 60 - 8

f(12) = 52

52 is your answer

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2 years ago

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Dimas [21]

Answer:

(x, y) → (kx, ky)

Step-by-step explanation:

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2 years ago

Find a number that is 4 more that is 4 more than 6 plus 4

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Answer:

Step-by-step explanation:

Find a number that is 4 more that is 4 more than 6 plus 4

4 more than 6 plus 4

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4 more means 4 + (6 +4)

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2 years ago