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Lana71 [14]
2 years ago
13

Solve by the linear combination method (with or without multiplication).

Mathematics
1 answer:
iris [78.8K]2 years ago
8 0
I hope this helps you

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Witch expression represents a number 5 times the difference of 6 and 2
nikklg [1K]

Answer:

i think it is 20

Step-by-step explanation:

6-2=4

4×5=20

6 0
2 years ago
A store manager is marking down chess boards from $25 to $14. What percentage is the discount?
Alborosie
Remember: when calculating percent it will always be over 100. With the given numbers 14 is your part out of the total (25). It should be written as part/whole.

As previously said, the percent is always over 100. (x/100)

In this problem you are given the part (14) and the whole (25). So it would be 14/25. The percent in this problem would be x/100. Now to find percent with the given part/whole, you would multiply 14 with 100. Then simply divide by 25.

7 0
3 years ago
Write the fraction as a sum of fraction three different ways 7/10
Fynjy0 [20]

Answer:

Step-by-step explanation:j7/10. 7 divided by 10. And .7

4 0
3 years ago
Read 2 more answers
12=15(z-1/5) does anybody know how to solve this
Fittoniya [83]

Answer:

-15

Step-by-step explanation:

5 0
3 years ago
A publisher reports that 45% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is
nexus9112 [7]

Answer:

z=\frac{0.40 -0.45}{\sqrt{\frac{0.45(1-0.45)}{370}}}=-1.933  

p_v =2*P(z  

Step-by-step explanation:

Information given

n=370 represent the sample selected

\hat p=0.4 estimated proportion of  readers owned a laptop

p_o=0.45 is the value that we want to test

z would represent the statistic

p_v represent the p value

Creating the hypothesis

We need to conduct a hypothesis in order to test if the true proportion of readers owned a laptop is different from 0.45, the system of hypothesis are:  

Null hypothesis:p=0.45  

Alternative hypothesis:p \neq 0.45  

The statistic is:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing we got:

z=\frac{0.40 -0.45}{\sqrt{\frac{0.45(1-0.45)}{370}}}=-1.933  

Calculating the p value  

We have a bilateral test so then the p value would be:

p_v =2*P(z  

8 0
2 years ago
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