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ira [324]
3 years ago
12

For the function f(x)=5x^2-7x, what is f(-3)? *

Mathematics
2 answers:
-Dominant- [34]3 years ago
8 0

Answer:

The answer to your question is   f(-3) = 66

Step-by-step explanation:

Data

Function             f(x) = 5x² - 7x

Process

To find f(x), just substitute the -3 in all the x's of the original equation and simplify.

-Substitution

                          f(-3) = 5(-3)² - 7(-3)

-Simplify

                          f(-3) = 5(9) + 21

                          f(-3) = 45 + 21

-Result

                          f(-3) = 66

blsea [12.9K]3 years ago
6 0

f(-3) = 66

Step-by-step explanation:

5(-3)^2-7(-3)

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Two rectangles are similar. The length and width of the first rectangle are 12
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Answer:

scale factor = 1.2

Step-by-step explanation:

To determine the scale factor, calculate the ratio of the length of the second rectangle to the length of the first rectangle. The corresponding ratio of widths should also equal the same ratio.

scale factor = \frac{14.4}{12} = \frac{6}{5} = 1.2

4 0
3 years ago
Sean's mom asks him how long his homework will take. He tells her that he needs to read for 25 minutes and also do some math pro
babunello [35]

Answer:

h = m + 25

Step-by-step explanation:

Total number of minutes for homework. h

Math problems will take m minutes.

He needs to read for 25 minutes.

h = m + 25


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6 0
3 years ago
Factor and find the zeros. z^2-z+56
Inessa [10]

Answer:

Sry its long but if your to lazy to look thru it here is the answer=   z = {-7, 8}

Step-by-step explanation:

Simplifying

z2 + -1z + -56 = 0

Reorder the terms:

-56 + -1z + z2 = 0

Solving:

-56 + -1z + z2 = 0

Solving for variable 'z'.

Factor a trinomial.

(-7 + -1z)(8 + -1z) = 0

Subproblem 1

Set the factor '(-7 + -1z)' equal to zero and attempt to solve:

Simplifying:

-7 + -1z = 0

Solving:

-7 + -1z = 0

Move all terms containing z to the left, all other terms to the right.

Add '7' to each side of the equation.

-7 + 7 + -1z = 0 + 7

Combine like terms: -7 + 7 = 0

0 + -1z = 0 + 7

-1z = 0 + 7

Combine like terms: 0 + 7 = 7

-1z = 7

Divide each side by '-1'.

z = -7

Simplifying:

z = -7

Subproblem 2

Set the factor '(8 + -1z)' equal to zero and attempt to solve:

Simplifying:

8 + -1z = 0

Solving:

8 + -1z = 0

Move all terms containing z to the left, all other terms to the right.

Add '-8' to each side of the equation.

8 + -8 + -1z = 0 + -8

Combine like terms: 8 + -8 = 0

0 + -1z = 0 + -8

-1z = 0 + -8

Combine like terms: 0 + -8 = -8

-1z = -8

Divide each side by '-1'.

z = 8

Simplifying:

z = 8

Solution

z = {-7, 8}

4 0
2 years ago
Give me the ans of this plss​
svet-max [94.6K]

Step-by-step explanation:

1. 9

2. 105

3. 8

4.0

Mark me branliest

7 0
3 years ago
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