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givi [52]
3 years ago
9

F(x) = –x2+ 7 x– 13 Find f(-3)

Mathematics
2 answers:
AVprozaik [17]3 years ago
5 0
<h2>Evaluating Functions</h2><h3>Answer:</h3>

f(-3) = -43

<h3>Step-by-step explanation:</h3>

Given:

f(x) = -x^2 +7x -13

Solving for f(-3):

f(-3) = -(-3)^2 +7(-3) -13 \\ f(-3) = -(9) +7(-3) -13\\ f(-3) = -9 -21 -13 \\ f(-3) = -43

sdas [7]3 years ago
5 0

Answer:

5x-13

Step-by-step explanation:

combine -2x and 7x to get 5x

and then you are left with 5x -13

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3x + 2y = 5<br> X – 2y = -1
inysia [295]

Answer:

(1, 1 )

Step-by-step explanation:

Given the 2 equations

3x +2y = 5 → (1)

x - 2y = - 1 → (2)

Adding the 2 equations term by term will eliminate the term in y, that is

(3x + x) + (2y - 2y) = (5 - 1)

4x = 4 ( divide both sides by 4 )

x = 1

Substitute x = 1 in either of the 2 equations and solve for y

Substituting in (1)

3(1) + 2y = 5

3 + 2y = 5 ( subtract 3 from both sides )

2y = 2 ( divide both sides by 2 )

y = 1

Solution is (1, 1 )

7 0
3 years ago
Please help with problem 6. (ONLY IF YOU KNOW)
Pani-rosa [81]
First multiply 20 by 17
second multiply 8 by 17
then you have to add 20 by 8 which will give you 28
so,476 divided by 17 gives you 28
6 0
3 years ago
H E L P *-* this is hard ): will give Brainliest !
Paladinen [302]
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5 0
3 years ago
Read 2 more answers
K is the midpoint of line JL. J has coordinates (2, -1), and K has coordinates (-4, 3). What are the coordinates of L?
Maksim231197 [3]
Well the midpoint formula to find the coordinates is ( (x₂ + x₁)/2 , (y₂ -+ y₁)/2 )
Basically you find the average of each points to find the midpoint. Well we already have the midpoint so  we plug our numbers in with variables to find the other point. Let's start with the x value of coordinate L:
(2 + x₁)/2 = -4    the 2 came from point J and the -4 came from the midpoint k.
2+ x₁ = -8
x₁ = -10        this is the  x coordinate of point L. Let's find the y
(-1 + y₁)/2 = 3
-1 + y₁ = 6
y₁ = 7      this is the y coordinate of L
L's coordinate is (-10, 7)

4 0
3 years ago
Find the domain and range of the relation, and determine whether it is a function.
mina [271]
The domain is all the x values so {2,-4, 1, 2, -1} 
The range is all the y values so    {1, 5, 7, -3, 2}

Yes, it is a function because each item in the domain matches one item in the ranges. 
7 0
4 years ago
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