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igor_vitrenko [27]
3 years ago
10

1. Consider the function f(x) = x² – 9. Algebraically determine the domain of y = Vf(x) . State using set notation.

Mathematics
1 answer:
AfilCa [17]3 years ago
8 0

Answer:

-3<x<3

Step-by-step explanation:

let y=0

0=x^2-9

0=(x+3)(x-3)

x=-3 and x=+3

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Help 3 and 4 please!!!!!!!!!!!!
aleksandrvk [35]
Easy peasy

the bit where it says
D={something}
those are the numbers you should input for x to get y values


3.
first solve for y to make life easier
-3x-5y=20
times -1
3x+5y=-20
minus 3x both sides
5y=-3x-20
divide both sides by 5
y=-3/5x-4
sub value of the domain
x=-10
y=-3/5(-10)-4
y=6-4
y=2
a point is (-10,2)

x=-5
y=-3/5(-5)-4
y=3-4
y=-1
(-5,-1) is another

x=0
y=-3/5(0)-4
y=-4
(0,-4) is another

x=5
y=-3/5(5)-4
y=-3-4
y=-7
(5,-7)

points are (-10,2), (-5,-1), (0,-4), (5,-7)



4.
input
x=-2
y=(-2)^2-3
y=4-3
y=1
(-2,1)

x=-1
y=(-1)^2-3
y=1-3
y=-2
(-1,-2)

x=0
y=(0)^2-3
y=-3
(0,-3)

x=1
y=(1)^2-3
y=1-3
y=-3
(1,-3)

x=2
y=(2)^2-3
y=4-3
y=1
(2,1)

the points are (-2,1), (-1,-2), (0,-3), (1,-2), (-2,1)

see graph below

5 0
2 years ago
Rock stars Ewe and Eye were both born on Sunday, January 1. When Ewe turned 13 years old Eye could not have been _____ years old
OLEGan [10]
The answer is C because
5 0
3 years ago
Show your work<br> 4(2x - 6) = 10x - 6
Elden [556K]

4.(2x - 6) = 10x - 6

4.2x - 4.6 = 10x - 6

8x - 24 = 10x - 6

-24 + 6 = 10x - 8x

-18 = 2x

x = -9

4 0
2 years ago
Read 2 more answers
Please Help 100 points Answer all please
Gemiola [76]

A. Yes

B.  Because the three inside angles of both triangles would be identical.

C. Set up a ratio:

 121/22 =  AB/30

Solve for AB:

AB = (121 * 30) / 22

AB = 3630 / 22

AB = 165 ft.

3 0
3 years ago
Why is finding the factor pairs only the first step in solving the problem
Oksi-84 [34.3K]
So you can know which pair to use in order to solve the problem.
8 0
3 years ago
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