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Svet_ta [14]
2 years ago
14

The sum of five times a number and -6 is -2.

Mathematics
1 answer:
Alex_Xolod [135]2 years ago
7 0
Equation: 5x+(-6)=-2
X=4/5 or 0.8
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Answer:

-22

Step-by-step explanation:

set y equal to zero and solve like a regular singular variable equation

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3 years ago
PLEASE HELP Im DESPERATE ASAP FOR BRAINLEST!!!!!!!!!!!!!!!!!!!!!!!
iren [92.7K]

Put 40y and 25.5

Step-by-step explanation:

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2 years ago
Evaluate the expression: -0.75 - (-1 7/8)
m_a_m_a [10]

Answer:

9/8

Decimal form: 1.25

Mixed Number form: 1 1/8

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4 0
3 years ago
A billing company that collects bills for​ doctors' offices in the area is concerned that the percentage of bills being paid by
omeli [17]

Answer:

1) A. H0: p = 0.30

HA: p not equal to 0.30

2) A. The Independence Assumption is met.

C. The Randomization Condition is met.

D. The Success/Failure Condition is met.

3) Test statistic z = 2.089

P-value = 0.0367

4) C. Reject H0. There is sufficient evidence to suggest that the percentage of bills paid by medical insurance has changed.

Step-by-step explanation:

1) This is a hypothesis test for a proportion.

The claim is that there is a significant change in the percent of bills being paid by medical​ insurance.

As we are looking for evidence of a difference, no matter if it is higher or lower than the null hypothesis proportion, the alternative hypothesis is defined by a unequal sign.

Then, the null and alternative hypothesis are:

H_0: \pi=0.3\\\\H_a:\pi\neq 0.3

2) Cheking the conditions:

The independence assumption and the randomization condition are met as the bills were selected randomly from the population.

The 10% condition can not be checked, as we do not know the size of the population.

The success/failure condition is met as the products np and n(1-p) are bigger than 10 (the number of successes and failures are both bigger than 10).

3) The significance level is assumed to be 0.05.

The sample has a size n=9260.

The sample proportion is p=0.31.

 

The standard error of the proportion is:

\sigma_p=\sqrt{\dfrac{\pi(1-\pi)}{n}}=\sqrt{\dfrac{0.3*0.7}{9260}}\\\\\\ \sigma_p=\sqrt{0.000023}=0.005

Then, we can calculate the z-statistic as:

z=\dfrac{p-\pi-0.5/n}{\sigma_p}=\dfrac{0.31-0.3-0.5/9260}{0.005}=\dfrac{0.01}{0.005}=2.089

This test is a two-tailed test, so the P-value for this test is calculated as:

\text{P-value}=2\cdot P(z>2.089)=0.0367

As the P-value (0.0184) is smaller than the significance level (0.05), the effect is  significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that there is a significant change in the percent of bills being paid by medical​ insurance.

5 0
3 years ago
Austin tried to remember his friend's house number. He knew that there were three digits: a 5, another 5 and a 7. He could not r
vladimir1956 [14]

Answer:

3

Step-by-step explanation:

557

575

755

8 0
3 years ago
Read 2 more answers
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