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3 years ago

Evaluate 9x - 11 for x = -3 and x = 7.

Mathematics

1 answer:

o-na [289]3 years ago

4 0

Answer:

-38,

Step-by-step explanation:

1. 9x-11=-27-11=-38

2. 9x-11=63-11=52

The answers are in order.

1. x=-3

2. x=7

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Anna and kim shared 49 jellybeans in the ratio 3:4.Howw many jellybeans did kim receive

lina2011 [118]

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Therefore Kim having 4/7 is 4 X 7

Answer - 28

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3 years ago

The monthly rent of Marilyn's house went from $500 to $440, If p is the

Mila [183]

Answer:

Step-by-step explanation:

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3 years ago

Kenny weight is 6/7 times Melvin weight. What is the ratio of Kenny weight to Melvin weight? Give answer in fraction form

SOVA2 [1]

-- Kenny's weight is 6/7 of Melvin's weight.

-- Melvin's weight is 7/7 of Melvin's weight.

-- The ratio of Kenny's weight to Melvin's weight is (6/7) / (7/7) = 6/7 .

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3 years ago

Construct the 95% confidence interval for the population mean using the appropriate distributions. a. A random sample of 50 peop

SSSSS [86.1K]

Answer: 95% confidence interval would be (26.01,29.39).

Step-by-step explanation:

Since we have given that

n = 50

Mean = 27.7

Standard deviation = 6.12

We need to construct 95% confidence interval for the population.

so, z = 1.96

So, it becomes,

$\bar{x}\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=27.7\pm 1.96\times \dfrac{6.12}{\sqrt{50}}\\\\=27.7 \pm 1.69\\\\=(27.7-1.69,27.7+1.69)\\\\=(26.01,29.39)$

Hence, 95% confidence interval would be (26.01,29.39).

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3 years ago