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3 years ago

Pls answer my question ty ;)

Mathematics

1 answer:

butalik [34]3 years ago

8 0

Answer:

x=11

Step-by-step explanation:

5x+7=62

5x=62-7

5x=55

x=11

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While at the music store, Drew bought 5 CDs, all at the same price. The tax on his purchase was $6 and the total was $61. Write

ankoles [38]

Answer:

The price per CD that Drew bought=$11

Step-by-step explanation:

Margie's total cost can be expressed as;

C=(p×n)+t

where;

C=total cost

p=price per unit of CD

n=number of CD bought

t=tax on purchase

In our case;

C=$61

p=unknown

n=5

t=$6

replacing;

61=(5×p)+6

5 p+6=61

5 p=61-6

5 p=55

p=55/5

p=11

The price per CD that Drew bought=$11

6 0

3 years ago

<img src="https://tex.z-dn.net/?f=10%5E8%2A10%5E-%5E3%3D%2010%5E%3F" id="TexFormula1" title="10^8*10^-^3= 10^?" alt="10^8*10^-^3

Dima020 [189]

Answer
10^5
Because you add exponents if multiplying and 8+-3 is 5

8 0

3 years ago

Read 2 more answers

What is 38% of 250 pls explain

cestrela7 [59]

95
did u mean a whole number or in a percent ??

6 0

3 years ago

Read 2 more answers

In order to estimate the mean amount of time computer users spend on the internet each month, how many computer users must be s

Sladkaya [172]

Answer:

The minimum sample size required is 5,499 computer users.

The major obstacle is that it is a big sample size if it is a small organization wanting to perform it.

Step-by-step explanation:

We need to calculate a sample size in order to have 95% confidence interval with 12 minutes of witdth.

So, we have that the difference between the upper limit and the lower limit is 12:

$UL-LL=12$

$(\mu+z*\sigma/\sqrt{n})-(\mu-z*\sigma/\sqrt{n})=12\\\\2z\sigma/\sqrt{n}=12\\\\\sqrt{n}=(1/6)*z\sigma\\\\n=(1/36)z^2\sigma^2$

For a 95% CI, the value of z is 1.96. The standard deviation is 227.

$n=z^2\sigma^2/36=(1.96)^2*(227)^2/36=3.8416*51,529/36=5498.72\\\\n=5499$

The minimum sample size required is 5,499 computer users.

6 0

3 years ago

1. 1<br>6. 9. common denominator<br>

BlackZzzverrR [31]

The common denominator is 18

8 0

3 years ago