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forsale [732]
3 years ago
13

F(-1) f(x) = -3x2 + 2x - 7

Mathematics
1 answer:
egoroff_w [7]3 years ago
3 0

Answer:

f(-1) = -12

Step-by-step explanation:

<u>Step 1:  Set x to -1 and solve</u>

<u />f(x) = -3x^2+2x-7

f(-1) = -3(-1)^2+2(-1) - 7

f(-1) = -3(1) - 2 - 7

f(-1) = -3 - 2 - 7

f(-1) = -12

Answer:  f(-1) = -12

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Each peice is 1.5 inches 
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What is the slope-intercept equation for the line below 
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Step-by-step explanation:

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A toy train is built with the ratio of the model to the real of 1:30. If the real train is supposed to be 55 feet long, how many
Zigmanuir [339]

Answer:

The answer to your question is 20 in

Step-by-step explanation:

Data

ratio  1 : 30

real length = 55 ft

toy train length = ?

Process

1.- Use ratio and proportions to solve this problem.

                           1 : 30 :: x : 55

solve

                           x = (55 x 1) / 33

Simplification

                           x = 55/33

result

                           x = 1.67 ft

2.- Convert the length to in

                         1 ft ------------------ 12 in

                        1.67 ft --------------   x

                          x = (1.67 x 12) / 1

-Simplification

                          x = 20/1

-Result

                           x = 20 in

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3 years ago
The general form for a linear equation is given as: y = a + bx. In the regression equation, b is called the ______.
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Answer:

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Step-by-step explanation:

In the regression equation y=a+bx, y is dependent variable and x is independent variable. It means that due to change in x the y changes respectively. The "a" is intercept of the model and it shows the value of y when x is zero. The "b" is the slope of the model and it depicts the change in y due to unit change in x. The positive value of b means that as the x increases y also increases and as the x decreases y also decreases. The negative value of b means that as the x decreases y increases and as the x increases the y decreases.The sign of b shows the type of relationship between independent and dependent variable.

5 0
3 years ago
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