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MariettaO [177]
3 years ago
8

A regression equation was estimated as = –100 + 0.5x. if x = 20,the predicted value of y is _____.

Mathematics
1 answer:
ratelena [41]3 years ago
5 0
Any answer things? :|
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Select the correct answer.
eimsori [14]

Answer:

D

Step-by-step explanation:

Given that

f(x)=-2x – 1

g(x) = -1/2x+1/2

I The function f( g(x)) = x for all real x.

-2(-1/2X + 1/2) - 1

X - 1 - 1

X - 2

II. The function glAx)) = x for all real x.

- 1/2( -2X - 1 ) + 1/2

X + 1/2 + 1/2

X + 1

III. Functions fand g are inverse functions

Inverse of f(x)

Y = -2x - 1

X = - 2Y - 1

- 2Y = X + 1

Y = - 1/2X - 1/2

Therefore, none of the above answers is correct.

The correct answer is therefore D

7 0
3 years ago
Read 2 more answers
What is the median of this set 14, 18, 31, 34, 44, 50
hodyreva [135]
Because there's an even number of values in this set, there is two middle values rather than one (31 and 34). To find the median we need to add them together and divide the sum by 2 (31 + 34 = 65, 65/2= 32.5) Our final answer is 32.5.
3 0
4 years ago
Read 2 more answers
Required<br> What effect does the sales tax or tip have on the final price? *
Montano1993 [528]

Answer:

Percentages: Price before and after sales tax

Step-by-step explanation:

this is the name of a vid that can help you

8 0
3 years ago
What is the slope of the graph?
zloy xaker [14]

Answer: the slope is defined as the ratio of vertical change between two point.

Step-by-step explanation: or known as the run. The slope of a line is mostly presented by the letter m.

6 0
3 years ago
How many solutions does 3(x+5)=-4x+8 have
Mashutka [201]

Answer:

1 solution and that is that x = -1

Step-by-step explanation:

4 0
4 years ago
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