3c+5=23 what is c? c=3 c=6 c=7 c=18

Mathematics

2 answers:

Reil [10]2 years ago

8 0

Answer:

c = 6

Step-by-step explanation:

Subtract 5 from both sides. This is to cancel out the + 5. You have 3c = 18
Divide both sides by 3. 18/3 = 6, so c = 6.

Mama L [17]2 years ago

3 0

Answer:

First, rearrange the equation so you can get the like terms together

3c=23-5

3c=18

c=18/3

c=6

Step-by-step explanation:

I hope this is the answer, and if it helped give me brainliest

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X is the GPA

Y is the Salary

Standard deviation of X is 0.4

Standard deviation of Y is 8500

E(X)=2.9

E(Y)=47200

We are given that The correlation between the two variables was r = 0.72

a) $y = a+bx$

$b = \frac{\sum(x_i-\bar{x})(y_i-\bar{y})}{\sum(x_i-\bar{x})^2} = \frac{r \times \sqrt{var(X) \times Var(Y)}}{Var(X)} = \frac{0.72 \times \sqrt{0.4^2 \times 8500^2}}{0.4^2} = 15300$

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So, slope = 15300

Intercept = 2830

So, equation : $y = 2830+15300x$

b) Your brother just graduated from that college with a GPA of 3.30. He tells you that based on this model the residual for his pay is -$1880. What salary is he earning?

$y = 2830+15300 \times 3.3 = 53320$