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TiliK225 [7]
1 year ago
5

Hey guys, I need help with these questions. I need them done by today! Please, help :( There are 4 questions or more I think, I

will give as many points as I can, and Brainlisest for the best answer!

Mathematics
1 answer:
Orlov [11]1 year ago
8 0

Answer:

Step-by-step explanation:

Domain x^2 - 9 {Solution: - infinity < x < infinity}

Interval notation (- infinity, infinity)

Range of x^2 - 9 (Solution: f(x) is greater than or equal to - 9)

Interval notation (-9, infinity)

Axis interception points of x^2 - 9:

X- intercepts (3, 0) (-3, 0)

Y-intercepts (0, -9)

Vertex of x^2 - 9: Minimum (0, -9)

Solve for f:

f (x) = x^2 - 9

Step 1: Divide both sides by x.

fx / x = x^2 - 9 / x

f = x^2 - 9 / x

Answer:

f = x^2 - 9 / x

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X+y+2=-5 -2x-y+2=-1 x-2y-2=0 solve algebraically
Rina8888 [55]

Answer:

x+y+2=-5 -2x-y+2=-1 x-2y-2=0 solve algebraically

x+y+2=-5     equation 1

-2x-y+2=-1    equation 2

x-2y-2=0      equation 3

Add equation 1 + 2+ 3

x+y+2=-5 + -2x-y+2+1 + x-2y-2

x+y+2= -7+2+1-2x+x+y

x+y+2= -4-x+y

x+y+2+4+x-y= 0

2x+6= 0

2x= -6

divide both side by 2

x= -3

from equation 1 insert x

x+y+2=-5

since x=-3

then, -3+2+y= -5

-1+y= -5

y= -5+1

y= -4

Step-by-step explanation:

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3 years ago
Which angle is an alternate interior angle to 8?
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Step-by-step explanation:

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5 0
2 years ago
kathi starts with a number. she adds 3 to her number, then doubles the result. finally, she subtracts 7. if she ended with 9 wha
11111nata11111 [884]
An equation is:
2(x+3)-7=9
Distribute the 2
2(x)+2(3) -7=9
2x+6-7=9
Combine like terms
2x-1=9
Add one to both sides
2x-1+1=9+1
2x=10
Divide both sides by two to isolate the variable.
2x/2=10/2
x=m

6 0
3 years ago
Read 2 more answers
What is the solution to 2r- 3.1 = 1.7
Ainat [17]
R= 2.4

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3 years ago
Kay and Allen sell cell phones. Last month Kay sold 17 more cell phones than Allen. Together they both sold 117 cell phones. How
mrs_skeptik [129]

Answer:

Kay sold 67; Allen sold 50

Step-by-step explanation:

Let "a" represent the number of phones that Allen sold.

a + (a+17) = 117 . . . equation used to find the answer

2a = 100 . . . . . . . . subtract 17, collect terms

a = 50 . . . . . . . . . . divide by 2; the number Allen sold

a+17 = 67 . . . . . . . . Kay sold 17 more than Allen

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3 years ago
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