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3 years ago

I need help with these two pls

Mathematics

1 answer:

natita [175]3 years ago

3 0

Answer:

1)D

2)A

Step-by-step explanation:

1) $-7a-2x+5a-6x\\-7a+5a-2x-6x\\-2a-8x$

The last choice is the correct answer.

$16bc-8ab=8b(2c-a)$

The answer is the first choice

PLEASE MARK ME AS BRAINLIEST

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Elza [17]

Answer:

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Step-by-step explanation:

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3 years ago

A researcher is interested in knowing the average height of the men in a village. To the researcher, the population of interest

Anna11 [10]

Answer:

The population mean height of men in the village is 5.78 feet.

The sample mean height of men in the village is 7.8 feet.

Step-by-step explanation:

It is provided that the researcher's interest is in knowing the average height of the men in a village.

To the researcher, the population of interest is the men in the village, the relevant population data are the height of men in the village, and the population parameter of interest is the mean height of men.

It is also provided that there are 590 men in the village, and the sum of their heights is 3,410.2 feet.

Compute the average height as follows:

$\bar X_{H}=\frac{3410.2}{590}=5.78\ \text{feet}$

Thus, the population mean height of men in the village is 5.78 feet.

It is given that the researcher measured the heights of 18 village men and calculated the average to estimate the average height of all the village men.

The sample for his estimation is 18 men, the relevant sample data are the heights of the 18 men, and the sample statistic is the sample mean height.

It is also given that the sum of the heights of the 18 village men is 104.4 feet.

Compute the average height of the 18 men as follows:

$\bar x_{H}=\frac{104.4}{18}=7.8\ \text{feet}$

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8 0

3 years ago

How many solutions does this quadratic equation have? 6p^2-7p+5=0

KatRina [158]

Answer:

It has no real solution.

Step-by-step explanation:

6p^2 − 7p + 5 = 0

For this equation: a = 6, b = -7, c = 5

6p^2+ −7p + 5 = 0

Step 1: Use quadratic formula with a=6, b=-7, c=5.

p = -b ± √b^2 - 4ac/2a

p = -(-7) ± √(-7)^2 - 4(6)(5)/2(6)

p = 7 ± √-71/12

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4 years ago

Read 2 more answers

Harriet and Maya share £300 in the ratio of 7:5. Wirk out how much money harriet gets

yKpoI14uk [10]

Answer:

$175

Step-by-step explanation:

you need to specify if harriet got the 7 portion or the 5 portion. I'll answer as if she got the 7 portion.

They split it into 12 portions because the ratio is 7:5 and 7+5=12. So do $300/12=25

Assuming Maya got the 5 portion, do $25 x 5 = $125, so Maya got $125.

Assuming Harriet got the 7 portion, do $25 x 7 = $175, so Harriet got $175.

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2 years ago

How are the slope formula and finding slope using rise over sun related?

Vladimir [108]

Answer:They are practically the same thing the only difference is you use the formula when you have coordinates and rise over run when you have the graph

Step-by-step explanation:

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2 years ago