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3 years ago

What is the solution of the system of equations c + 4d = 8 and c = 4d - 6

Mathematics

2 answers:

kipiarov [429]3 years ago

8 0

C+3D=8
C=8-3D
C=4d-6
8 -3d =4d-6
8+6=4d+3D
14=7d
D=2

Tema [17]3 years ago

3 0

Rewrite the second equation in same form as the first So we have

c + 4d = 8

c - 4d = -6 Now add:-

2c + 0 = 2
2c = 2

c = 1

Now substitute c = 1 in the first equation:-

1 + 4d = 8
4d = 7

d = 7/4 = 1 3/4

Answer c = 1 and d = 1 3/4 Answer

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Answer:

$\mu_{\hat{p}}=0.19$

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Step-by-step explanation:

We know that the mean and the standard error of the sampling distribution of the sample proportions will be :-

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$\sigma_{\hat{p}}=\sqrt{\dfrac{p(1-p)}{n}}$

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Given : The proportion of students at a college who have GPA higher than 3.5 is 19%.

i.e. p= 19%=0.19

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The mean and the standard error of the sampling distribution of the sample proportions will be :-

$\mu_{\hat{p}}=0.19$

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3 years ago

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Oduvanchick [21]

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Step-by-step explanation:

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So, your answer is C

$----------$

hope it helps...

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Read 2 more answers