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HACTEHA [7]
4 years ago
9

Simplify the given expression. 13 + (14a+5b) HELP

Mathematics
2 answers:
Natasha2012 [34]4 years ago
8 0

Answer:

13 + 14a + 5b

Step-by-step explanation:

when there's a + in front of a expression

in parentheses the expression remains the same

Vesnalui [34]4 years ago
5 0

Answer:

14a + 5b + 13

Step-by-step explanation:

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A basketball player has attempted 24 shots and made 17 find the experimental probability round to three decimal places
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0.708

Step-by-step explanation:

A great way to solve for probability is to create a fraction.

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17/24 is our fraction.

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What is the volume of a cube if it is 25cm long 6cm wide and 4cm high
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3 0
3 years ago
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A study1 conducted in July 2015 examines smartphone ownership by US adults. A random sample of 2001 people were surveyed, and th
dusya [7]

Answer:

a) Null hypothesis:p_{1} = p_{2}    

Alternative hypothesis:p_{1} \neq p_{2}  

b) z=\frac{p_{1}-p_{2}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{1}}+\frac{1}{n_{2}})}}   (1)  

Where \hat p=\frac{X_{1}+X_{2}}{n_{1}+n_{2}}=\frac{688+671}{989+1012}=0.679  

c) z=\frac{0.696-0.663}{\sqrt{0.679(1-0.679)(\frac{1}{989}+\frac{1}{1012})}}=1.58    

d) For this case we see that \hat p_1 > \hat p_2 so then the answer for this cae would men

Step-by-step explanation:

Information given

X_{1}=688 represent the number of men with smartphone  

X_{2}=671 represent the number of women with smartphone

n_{1}=989 sample of men selected

n_{2}=1012 sample of women selected

p_{1}=\frac{688}{989}=0.696 represent the proportion of men with smartphone

p_{2}=\frac{671}{1012}=0.663 represent the proportion of women with smartphone

\hat p represent the pooled estimate of p

z would represent the statistic

p_v represent the value

Part a

We want to test if we have difference in the proportion owning a smartphone between men and women, the system of hypothesis would be:  

Null hypothesis:p_{1} = p_{2}    

Alternative hypothesis:p_{1} \neq p_{2}    

Part b

The statistic for this case is given by:

z=\frac{p_{1}-p_{2}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{1}}+\frac{1}{n_{2}})}}   (1)  

Where \hat p=\frac{X_{1}+X_{2}}{n_{1}+n_{2}}=\frac{688+671}{989+1012}=0.679  

Part c

Replacing the info given we got:

z=\frac{0.696-0.663}{\sqrt{0.679(1-0.679)(\frac{1}{989}+\frac{1}{1012})}}=1.58    

Part d

For this case we see that \hat p_1 > \hat p_2 so then the answer for this cae would men

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In the diagram below BD is parallel to XY. What is the value of x
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The value of x is 60 degrees

Alternate interior angles are congruent by definition :)

Brainliest please?

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3 years ago
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