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3 years ago

Please Help extra points

Mathematics

1 answer:

Molodets [167]3 years ago

3 0

$1^{st}$ : $24.48 per year + price * 0.85

$2^{nd}$ : $36.83 per year + price * 0.75

Substitute each value into both equations as price.

129.4635

129.4625

98.158

101.84

145.2055

143.3625

155.703

152.615

A is the lowest value where the second value is lower than the first.

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58a + 49 is the correct answer

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Find the following rates. Round your answer to the nearest hundredth. a. ? % of 75 = 5 b. ? % of 28 = 140 c. ? % of 100 = 40 d.

Sati [7]

Answer:

a) 6.67% b) 500% c) 40% d) 7.5%

Step-by-step explanation:

a. ? % of 75 = 5

Let ? be y.

Of means multiply so we will replace it with a multiplication sign.

y% x 75 = 5

y% = 5/75

y% = 1/15 x 100

y = 6.67 %

b) ?% of 28 = 140

Let ? be y.

Of means multiply so we will replace it with a multiplication sign.

y% x 28 = 140

y% = 140/28

y% = 5

y = 5 x 100

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c) ?% of 100 = 40

Let ? be y.

Of means multiply so we will replace it with a multiplication sign.

y% x 100 = 40

y% = 40/100

y% = 2/5

y = 2/5 x 100

y = 40%

d) ?% of 200 = 15

Let ? be y.

Of means multiply so we will replace it with a multiplication sign.

y% x 200 = 15

y% = 15/200

y% = 3/40

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Emily had $56 in her account. She deposited a $265 check, and bought three equally priced backpacks for her children. The next d

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Answer:

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The average expenditure on Valentine's Day was expected to be $100.89 (USA Today, February 13, 2006). Do male and female consume

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Answer:

Yes. The male and female consumers differ in the amounts they spend.

Step-by-step explanation:

We can express the null and alternative hypothesis as:

$H_0: \mu_m=\mu_w\\\\H_1: \mu_m\neq\mu_w$

It is assumed a significance level of 0.05.

The standard deviation of the difference of means is calculated as:

$s=\sqrt{\frac{s_m^2}{n_m} +\frac{s_w^2}{n_w} } =\sqrt{\frac{35^2}{40} +\frac{20^2}{30} } =\sqrt{30.625+13.333} =\sqrt{43.958} =6.63$

The test statistic is

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The degrees of freedom are:

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