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Neporo4naja [7]
3 years ago
12

What is the value of f(x)=3x-4 if x = -4?​

Mathematics
2 answers:
ikadub [295]3 years ago
6 0

Answer:

-16

Step-by-step explanation:

when x = -4

f(-4) = 3(-4) - 4 = -16

balandron [24]3 years ago
4 0

Answer:

f(-4)=3(-4)-4

f(×)=48

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Answer:

47

Step-by-step explanation:

3 0
3 years ago
It’s late work and I’ve forgotten how to do it
Veseljchak [2.6K]
You want to eliminate one of the terms (x or y) in one of the equations so you can solve for the other variable.  You have to multiply by the opposite number of the coefficient to be able to eliminate the term in the other equation.  If the x coefficient is 2, then you have to multiply the entire other equation by -2.  If the y coefficient is -5, then you have to multiply the entire other equation by 5.


10)
-4x + 9y= 9
x - 3y= -6

STEP 1:
multiply the bottom equation by 4
4(x- 3y)= 4(-6)
4x - 12y= -24

STEP 2:
add the top equation and the equation from step 2

-4x + 9y= 9
4x - 12y= -24
the x term cancels out

-3y= 15
divide both sides by -3

y= -5

STEP 2:
substitute the y value in either original equation to solve for x

x - 3y= -6
x - 3(-5)= -6

x + 15= -6
subtract 15 from both sides

x= -21

ANSWER: x= -21; y= -5
____________________

12)
-7x + y= -19
-2x + 3y= -19

STEP 1:
multiply the top equation by -3 to eliminate the y term and to solve for x

-3(-7x + y)= -3(-19)
21x - 3y= 57

STEP 2:
add the bottom equation and the equation from step 2 to solve for x

-2x + 3y= -19
21x - 3y= 57
the y term cancels out

19x= 38
divide both sides by 19

x= 2

STEP 3:
substitute the x value in step 2 to solve for y; you can use either original equation

-7x + y= -19
-7(2) + y= -19

-14 + y= -19
add 14 to both sides

y= -5

ANSWER: x= 2; y=-5

Hope this helps!  :)

4 0
3 years ago
During a drive to Arizona, for the first two hours Emily drove at 50 mph,
galina1969 [7]

Answer:

the EXACT answer is 29.16666667

Step-by-step explanation:

First you add 50, 60, and 65 and get 175

she is driving for 6 hours so you divide 175 by six to get the average

Then you get 29.16666667

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2 years ago
How do rigid motions affect a given figure?
12345 [234]
Can you post a picture about the question
3 0
3 years ago
Whats the answer? A, B, C, or D??
vesna_86 [32]

Answer:

C is the correct answer

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