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Sedbober [7]
3 years ago
15

What is the simplest form of this expression? -5(-b+2)+7

Mathematics
1 answer:
Ratling [72]3 years ago
6 0

hope it helps you.....

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The difference of 3/8 of 1/2 and 3/4 of 1/3
Rainbow [258]

Answer:

difference between 3/8 and 1/2 is 1/8

difference between 3/4 and 1/3 is

5/12 i believe

Step-by-step explanation:

just change to common denominator and find the difference

5 0
3 years ago
A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained i
alex41 [277]

Answer:

sample size if he uses a previous estimate of 32​% is 523

sample size if he does not use any prior​ estimates is 601

Step-by-step explanation:

estimate E = 4 percentage = 0.04

confidence Cl = 95% = 0.95

previous estimate p = 32% = 0.32

q = 1 - 0.32 = 0.68

to find out

size of sample

solution

first we calculate z value for 95% confidence E = 0.04 is 1.96

from probability P(-1.96 < z < 1.96) = 0.95)

here z = 1.96

so in 1st part size of sample we know

E = z × \sqrt{pq/n}

put all value E, z p and q and we get n

n = (z/E)² ×p×q

n = (1.96/0.04)² ×0.32×0.68

n = 523

sample size if he uses a previous estimate of 32​% is 523

now in 2nd part we take p = 0.5

so n will be

n = (z/E)² ×p×q

n = (1.96/0.04)² ×0.5×0.5

n = 601

sample size if he does not use any prior​ estimates is 601

6 0
3 years ago
True or false please help it’s due right now
Free_Kalibri [48]

Answer:

false

Step-by-step explanation:

Triangle = 5*6=30/2=15

Parallelogram = 6*5 = 30

7 0
3 years ago
Read 2 more answers
Its not A i just took the test on edg and it was wrong.
Nat2105 [25]

Answer:

That sucks

Step-by-step explanation:

4 0
3 years ago
What is 5 1/4 - 3 3/4 = ?
Bad White [126]
5 1/4 - 3 3/4 = 4 5/4 - 3 3/4 = 1 2/4
4 0
3 years ago
Read 2 more answers
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