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RoseWind [281]
2 years ago
6

Use the expression (10p+10)+(8p−1). Simplify using properties of operations and then factor the expression using the GCF.

Mathematics
1 answer:
Fofino [41]2 years ago
7 0

Answer:

9 (2p + 1)

Step-by-step explanation:

(18p + 9)

GCF = 9

so, divide everything by 9

9 (2p + 1)

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According to the website www.collegedrinkingprevention.gov, "About 25 percent of college students report academic consequences o
astraxan [27]

Answer:

The required confidence interval is (3.068,4.732)

Step-by-step explanation:

Consider the provided information.

He plans to use a 90% confidence interval. He surveys a random sample of 50 students. The sample mean is 3.90 alcoholic drinks per week. The sample standard deviation is 3.51 drinks and wants to construct 90% confidence interval.

Thus, n=50, \bar x=3.90 σ=3.51

Now find degree of freedom.

df=n-1\\df=50-1=49

The confidence level is 90% and df=49

Therefore,

\frac{\alpha}{2} =\frac{1-0.90}{2}

\frac{\alpha}{2} =0.05

Now by using t distribution table look at 49 df and  alpha level on 0.05.

t_{\frac{\alpha}{2}} = 1.67653

Calculate SE as shown:

SE=\frac{\sigma}{\sqrt{50} }

SE=\frac{3.51}{\sqrt{50}}=0.4964

Now multiply 1.67653 with 0.4964

Therefore, the marginal error is: 1.67653 × 0.4964≈ 0.832

Now add and subtract this value in given mean to find the confidence interval.

\bar x-E

Hence, the required confidence interval is (3.068,4.732)

4 0
3 years ago
1.4 + 3.2 x 2.95 =?<br> First one to help is gonna be marked brainliest.
777dan777 [17]

Answer:

10.84

Step-by-step explanation:

First we multiply

1.4+(3.2×2.95)

1.4+9.44=

=10.84

4 0
3 years ago
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6. b∈{-20, 20}
6 0
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