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2 years ago

Please answer this correctly without making mistakes

Mathematics

1 answer:

morpeh [17]2 years ago

4 0

Answer:

2nd one is corect

60% is 93.49$ but u are getting 100$ discount so 2nd is ans

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Find the sum of 160,-125, and 40.

djyliett [7]

The answer is;

160 + (-125) + 40 = 75

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3 years ago

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Write the prime factorization of 12. Use exponents when appropriate and order the factors from least to greatest (for example,22

KatRina [158]

Answer:

the answer is 2×2×3 I think

6 0

2 years ago

Voting An appropriations bill passes the U.S. House of Representatives with 49 more members voting in favor than against. If all

sukhopar [10]

Answer:

242 members voted in favor while 193 members voted against

Step-by-step explanation:

Let those that voted against be x will those in favor will be (x+49)

Since today number of voters is 435

To find x

X + (x+49) = 435

2x + 49 = 435

2x = 435 - 49

2x = 386

X = 386/2

X = 193

Therefore, those against is 193 while this in favor is 193+49 = 242

6 0

2 years ago

Pam can run four laps around the track in 330 sec. Patrick can run two laps around the track in 180 sec. which person. Runs the

Aleonysh [2.5K]

Patrick because he can run 1 lap in 90 seconds

3 0

3 years ago

A researcher at the University of Washington medical school believes that energy drink consumption may increase heart rate. Supp

Nana76 [90]

Answer:

Step-by-step explanation:

Given that:

mean μ = 70

sample size = 25

sample mean = 73

standard deviation = 7

level of significance = 0.10

The null hypothesis and the alternative hypothesis can be computed as follows:

$\mathtt{H_o : \mu = 70} \\ \\ \mathtt{H_1 : \mu > 70 }$

The z score for this statistics can be calculated by using the formula:

$z = \dfrac{X- \mu}{\dfrac{\sigma}{\sqrt{n}}}$

$z = \dfrac{73- 70}{\dfrac{7}{\sqrt{25}}}$

$z = \dfrac{3}{\dfrac{7}{5}}$

$z = \dfrac{3 \times 5}{{7}{}}$

z = 2.143

At level of significance of 0.10

degree of freedom = n -1

degree of freedom = 25 - 1

degree of freedom = 24

The p - value from the z score at level of significance of 0.10 and degree of freedom of 24 is:

P - value = 1 - (Z < 2.143)

P - value = 1 - 0.9839

P - value = 0.0161

Decision Rule: since P value is lesser than the level of significance, we reject the null hypothesis.

Conclusion: We conclude that energy drink consumption increases heart rate.

5 0

2 years ago