3 years ago

HELP ASAP WILL MARK BRAINLIEST!!!!

Mathematics

1 answer:

Gnesinka [82]3 years ago

4 0

E=mc2 (5-2)x+99.03 with the addition of beans

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The sum of three numbers is 121 The third number is 3 times the second. The first number is 6 times the second. The first number

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Answer:

The first number is

72.6

Step-by-step explanation:

Let second number be x.

First number= 6x

Third number= 3x

According to question,

6x+x+3x=121

or, 10x=121

or,x=121/10=12.1

First number= 6x=6×12.1=72.6

Third number=3x=3×12.1=36.3

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5. The cost per person to rent a chartered bus varies inversely to the number of people a who ride the bus. If 40 people pay $9.

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Answer d $380.00 or answer a $24.00

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2 years ago

Whats 1+1+1+1+1+1+1+1x0+1+1+1+1x1=?

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Step-by-step explanation:

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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?

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