Add the two expressions. −2.4n−3 and −7.8n+2

Mathematics

2 answers:

BabaBlast [244]2 years ago

8 0

-10.2n-1 is the answer. You add like terms to get this. So, -2.4n+(-7.8n)=10.2n and -3+2=-1

meriva2 years ago

4 0

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fredd [130]

Answer:

Since the calculated value of z= -1.496 does not fall in the critical region z < -1.645 we conclude that the new program is effective. We fail to reject the null hypothesis .

Step-by-step explanation:

The sample proportion is p2= 7/27= 0.259

and q2= 0.74

The sample size = n= 27

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q1= 0.6

We formulate the null and alternate hypotheses that the new program is effective

H0: p2> p1 vs Ha: p2 ≤ p1

The test statistic is

z= p2- p1/√ p1q1/n

z= 0.259-0.4/ √0.4*0.6/27

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The significance level ∝ is 0.05

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Since the calculated value of z= -1.496 does not fall in the critical region z < -1.645 we conclude that the new program is effective. We fail to reject the null hypothesis .

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3 years ago

The sum of nine-tenths and g is two-thirds solve for g

Naya [18.7K]

Answer:

- 7/30

Step-by-step explanation:

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So subtract 9/10 from both sides of the equation to get g = -7/30

Thank me later :D

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3 years ago