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3 years ago

Which of the following is(are) the solution(s) to |5x+2|=8 ?

Mathematics

2 answers:

konstantin123 [22]3 years ago

8 0

Answer:

-2, 1⅕ = x

Step-by-step explanation:

$5x + 2 = -8 \: \: \: \: \: \: \: \: \: \: \: 5x + 2 = 8$

- 2 - 2 - 2 - 2

________________ ____________

5x = -10 5x = 6

___ ___ ___ ___

5 5 5 5

x = -2 x = 1⅕

I am joyous to assist you anytime.

slega [8]3 years ago

7 0

Answer:

x = 6/5 or x = -2

Step-by-step explanation:

We need to solve:

|5x+2|=8

We know that |u|=a the u = a and u = -a

Now solving:

|5x+2|=8

5x +2 = 8 or 5x +2 = -8

5x = 8-2 or 5x = -8-2

5x = 6 or 5x = -10

x = 6/5 or x = -10/5

x = 6/5 or x = -2

So, x = 6/5 or x = -2

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Franchise Business Review stated over 50% of all food franchises earn a profit of less than $50,000 a year. In a sample of 130 c

nydimaria [60]

Answer:

We need a sample size of 564.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

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For this problem, we have that:

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Based upon a 95% confidence interval with a desired margin of error of .04, determine a sample size for restaurants that earn less than $50,000 last year.

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n is found when $M = 0.04$