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nirvana33 [79]
3 years ago
9

Can someone help me with this problem please ​

Mathematics
2 answers:
salantis [7]3 years ago
4 0
Domain: f (x) is the set of all values for which the function is defined
range: the set of all values that f takes
hope this helps
Dafna11 [192]3 years ago
4 0

Answer:

Domain: f(x) = All Real Numbers, Range: f(x) = 2x

Step-by-step explanation:

Seems obvious.

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You work at Dave's Donut Shop. Dave has asked you to determine how much each box of a dozen donuts should cost. There are 12 don
slava [35]
A box of donuts would cost: b = 3.84 + 0.18f

First, we have to find the total cost of the donuts. 
12 x 0.32 = 3.84

Next, we need to determine the cost of the box. However, we don't know the surface area, just the cost per foot. We can multiply the number of square feet of the box by $0.18 to find the cost.

So our equation could be:  b = 3.84 + 0.18f (where f is the surface area of the box in square feet)
8 0
3 years ago
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

8 0
3 years ago
What is 6 times 4/9?
Ainat [17]
2.666. The 6 is repeating
3 0
3 years ago
Read 2 more answers
When x=2 and y=3, which expression has the smallest value?<br> x-y<br> x(y)<br> x+y <br> x/y
Archy [21]

Answer:

  x - y = -1

Step-by-step explanation:

The value of the first expression is negative:

  2 - 3 = -1

All of the other expressions give positive values, so are larger.

The expression with the smallest value is x-y.

_____

If x(y) is supposed to mean x^y, the exponentiation operator is needed. Otherwise, it is interpreted as x·y.

6 0
3 years ago
Read 2 more answers
Hejsksksklelelelslejek
Kay [80]

Answer:

100000x40=4000000

Step-by-step explanation:

It took me so long pls brainliset

8 0
2 years ago
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