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3 years ago

(10a+53a-37) divided by (10a - 7)

Mathematics

1 answer:

Triss [41]3 years ago

6 0

Answer:

63/10 + 71/ 10 (10a -7)

Step-by-step explanation:

Hope this helps! Tell me if its wrong! If its right give me 5 stars & a Thank you please!!

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a=x squared or x times itself

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2 years ago

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At what points will Al be producing the most equal amounts of sandwiches and salads?

Neporo4naja [7]

Answer: D, Y, X

<u>Step-by-step explanation:</u>

The (salad, sandwich) coordinates are as follows:

A: (0, 10)

B: (1, 8)

C: (2, 6)

D: (3, 4) MOST EQUAL AMOUNTS

E: (4, 2)

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3 years ago

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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

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) $y = a+bx$

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

$a=y-bx = 47200-(15300 \times 29) = 2830$

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?

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

Observed salary = Residual + predicted = -1860+53320 = 51440

c)) What proportion of the variation in salaries is explained by variation in GPA?

The proportion of the variation in salaries is explained by variation in GPA = $r^2 = (0.72)^2 =0.5184$

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3 years ago

Solve for x: 1 < x + 3 < 4

Mnenie [13.5K]

Answer:

-2<x<1

Step-by-step explanation:

That's all it can go I think.

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3 years ago