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3 years ago

3m - (7m+12) =2 (m-3)

1 answer:

7 0

Remove parentheses
3m - 7m+12 = 2 m-3

collect like terms
3m-7m-12 = 2m-6

move terms
-4m - 12 = 2m-6

collect the like terms and calculate
-4m-2m = -6+12

divide both sides by -6
-6m=6

m= -1

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63 : 21 = __ : 3 I need help pls a quick answer would be great. Thanks!

JulijaS [17]

Answer:

9 : 3

Step-by-step explanation:

To get from 21 to 3 we divided 21 by 7, therefore we have to do the same to the other side and so we get...

63 / 7 = 9

Therefore 63 : 21 = 9 : 3

7 0

3 years ago

Read 2 more answers

What is 10^8 written in standard form?

Paladinen [302]

Answer:

100,000,000 = 10^8

Step-by-step explanation:

3 0

3 years ago

Assume that you plan to use a significance level of α = 0.05 to test the claim that p1 = p2. Use the given sample sizes and numb

dezoksy [38]

Answer:

The calculated value Z = 3.775 > 1.96 at 0.05 level of significance

Null hypothesis is rejected

The Two Population proportion are not equal

Step-by-step explanation:

Given first sample size n₁ = 677

First sample proportion

$p^{-} _{1} = \frac{x_{1} }{n_{1} } = \frac{172}{677} = 0.254$

Given second sample size n₂ = 3377

second sample proportion

$p^{-} _{2} = \frac{x_{2} }{n_{2} } = \frac{654}{3377} = 0.1936$

Null Hypothesis : H₀ : p₁ = p₂.

Alternative Hypothesis : H₁ : p₁ ≠ p₂.

Test statistic

$Z = \frac{p_{1} ^{-}-p^{-} _{2} }{\sqrt{P Q(\frac{1}{n_{1} } +\frac{1}{n_{2} }) } }$

where

$P = \frac{n_{1} p_{1} + n_{2} p_{2} }{n_{1}+n_{2} } = \frac{677 X 0.254+3377 X 0.1936}{677+3377}$

P = 0.2036

Q = 1 - P = 1 - 0.2036 = 0.7964

$Z = \frac{0.254- 0.1936 }{\sqrt{0.2036 X 0.7964(\frac{1}{677 } +\frac{1}{3377 }) } }$

Z = 3.775

Critical value ∝=0.05

Z- value = 1.96

The calculated value Z = 3.775 > 1.96 at 0.05 level of significance

Null hypothesis is rejected

The Two Population proportion are not equal

3 0

3 years ago

Can someone take 3 min for there time and help me with this please??

seropon [69]

Since the left side of the equation says f(5), then plug in 5 for x.

So, it is:

-4|5| + 3
= -20 + 3
= 23

4 0

3 years ago

What is the equation of a parabola whose vertex is at the origin and whose directrix is y = 3? a. y2 = 12x b. y2 = -12x c. x2 =

Ugo [173]

Answer:

5x +3 43vis the answer fir it

5 0

2 years ago