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Studentka2010 [4]

3 years ago

9

The main mathematical step used to solve percent proportion is...

2 answers:

Ilia_Sergeevich [38]3 years ago

8 0

Answer:

Mutiply The numbers by 100 to turn into a percent.

Step-by-step explanation:

Scrat [10]3 years ago

6 0

To solve percent problems, you can use the equation, Percent · Base = Amount, and solve for the unknown numbers. Or, you can set up the proportion, Percent =, where the percent is a ratio of a number to 100. You can then use cross multiplication to solve the proportion.

Hope this Helps you... =)=)

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If LP = 15 and PR = 9, find LR. Explain.

Rudiy27

Answer:

24

Step-by-step explanation:

LP = 15 on one side

LR= 9 on the other side

____________________|____________|

P L R

add them and PR is 24

15+9= 24

5 0

3 years ago

What is the value of the expression? - 16+ 12 <br>A. -28 <br>B. -4 <br>C. 4<br>D. 28

mixer [17]

Answer:

B. -4

Step-by-step explanation:

-16 + 12 = -4

7 0

3 years ago

You measure 22 textbooks' weights, and find they have a mean weight of 64 ounces. Assume the population standard deviation is 5.

lara31 [8.8K]

Answer:

Step-by-step explanation:

We want to determine a 90% confidence interval for the true population mean textbook weight.

Number of sample, n = 22

Mean, u = 64 ounces

Standard deviation, s = 5.1 ounces

For a confidence level of 90%, the corresponding z value is 1.645. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean ± z ×standard deviation/√n

It becomes

64 ± 1.645 × 5.1/√22

= 64 ± 1.645 × 1.087

= 64 ± 1.788

The lower end of the confidence interval is 64 - 1.788 = 62.21 ounces

The upper end of the confidence interval is 64 + 1.788 = 65.79 ounces

Therefore, with 90% confidence interval, the true population mean textbook weight is between 62.21 ounces and 65.79 ounces

3 0

3 years ago

I need help please!!!

marusya05 [52]

A) 1.5, you can cross off C and D because that's area. the only reasonable would be 1.5 and 5.8. But 5.8 would mean cutting half of the board.

3 0

3 years ago

PLEASE HELP QUICK!!! WILL GIVE BRAINLIEST!!

Lera25 [3.4K]

Answer:

$\boxed{\bold{112}}$

Step By Step Explanation:

Follow PEMDAS Order Of Operations

Calculate Within Parenthesis: $\bold{120+\left(12\div \:3\cdot \:30\right): \ 240}$

$\bold{240\div \:20+10^2}$

Calculate Exponents: $\bold{10^2: \ 100}$

$\bold{240\div \:20+100}$

Divide: $\bold{240\div \:20: \ 12}$

$\bold{12+100}$

Add

$\bold{112}$

➤ $\boxed{\bold{Mordancy}}$

4 0

3 years ago