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erma4kov [3.2K]

2 years ago

15

Rearrange w=3(2a+b)-4 to make a the subject

1 answer:

garik1379 [7]2 years ago

4 0

Answer:

w-6b+4/6

Step-by-step explanation:

To get the answer you have to first open the bracket which will give you w=6a+6b-4.You then take 6b-4 to the other side to meet w after this divide all by 6 to make a the subject of the formula.

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A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic ca

Ugo [173]

Answer: A. 664

Step-by-step explanation:

Given : A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic cable TV service.

But there is no information regarding the population proportion is mentioned.

Formula to find the samples size , if the prior estimate to the population proportion is unknown :

$n=0.25(\dfrac{z*}{E})^2$

, where E = Margin of error.

z* = Two -tailed critical z-value

We know that critical value for 99% confidence interval = $z*=2.576$ [By z-table]

Margin of error = 0.05

Then, the minimum sample size would become :

$n=0.25(\dfrac{2.576}{0.05})^2$

Simplify,

$n=0.25\times2654.3104=663.5776\approx664$

Thus, the required sample size= 664

Hence, the correct answer is A. 664.

5 0

3 years ago

Can somebody help me with this plz......

adelina 88 [10]

Answer:

He must score 83 in the last test.

Step-by-step explanation:

To get a mean of 80 Terry must score a total of 4*80 = 320 over the 4 tests.

So his score for the last test must be 320 - (71 + 80 + 86)

= 320 - 237

= 83.

5 0

2 years ago

3x + 7x=<br> Combine like terms

Gnoma [55]

Answer:

10x

Step-by-step explanation:

3x + 7x

= 10x

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2 years ago

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Marianna [84]

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4 0

3 years ago

PLZ HELP WITH ALGEBRA <br><br> 1/3 (45- 18/7)<br><br> Please put into simplest form

Temka [501]

Here is the answer- 297. I hope this helps! I solved this by changing the fractions so that they had the same denominators.

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3 years ago