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fredd [130]
3 years ago
15

Please help down below

Mathematics
2 answers:
Alex3 years ago
3 0

Answer:

1 7/10 is the answer

Step-by-step explanation:

let me know if not

Mnenie [13.5K]3 years ago
3 0

Answer:

1 and 7/10

Step-by-step explanation:

Start off with making the fractions have common denomators by making 1/2 into 5/10 and 4/5 into 8/10

3-1=2, but the fractions go into negative, eating into the 2 whole number.

5/10-8/10=-3/10, or 1 and 7/10 total.

I hope this helps and you have a great day :)

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A college job placement office collected data about students’ GPAs and the salaries they earned in their first jobs after gradua
frez [133]

Answer:

X is the GPA

Y is the Salary

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Standard deviation of Y is 8500

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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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