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pashok25 [27]
3 years ago
7

PLEASE HELP ASAP!!!!! Evaluate the expression -11(z - 9) when z = 8

Mathematics
2 answers:
ladessa [460]3 years ago
5 0
It’s 11

If Z = 8 then wherever you see a “Z” in the equation, put 8.

So -11([8]-9) = 11
djyliett [7]3 years ago
5 0

Answer:

11

Step-by-step explanation:

put 8 in for all of the z

-11 (8-9)

distribute the -11 throughout

-88+99 = 11

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Rewrite the function in intercept form y=x^2+8x+15
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3 0
3 years ago
How do you solve 3x-2y=-5 ; 3y-4x=8 for x and y. Explain please.
blagie [28]
3x-2y=-5
3y-4x=8

1) multiply the first equation by 3
   3(3x-2y=-5)   this will give you the new equation: 9x-6y=-15

2) multiply the second equation by 2
   2(3y-4x=8)    this should give you the equation: 6y-8x=16

3) combine both equations/ like terms
    9x-6y=-15
    6y-8x=16

4) -6y and 6y cancel out 
    9x=-15
    -8x=16

5)  9x and -8x combine to make 1x or just x and -15 combined with 16 gives you just 1

6) we are now left with:
    x=1 

7) plug in the x to any of the two original equations ( i chose the first) 
   3x-2y=-5 
   3(1) - 2y = -5
   3 - 2y = -5
   -2y = -8
   y = 4
   When you plug in the x=1 you are given 3(1) - 2y = -5
   Distribute the 3 and you should have 3 - 2y = -5
   Subtract 3 from 3 (this cancels out) then from -5
   This should leave you with -2y = -8 ( -3 and -5 add to -8)
   Divide by -2 ( -2 divided by -2 cancels out) 
   -8 divided by -2 gives you 4 (two negatives make a positive)
   
So, y=4 and x=1
 To check, plug in x=1 and y=4 into one equation. when you're done with that you can plug them into the other. when you plug them into the first equation you get -5=-5 which means they worked. when plugged into the second, the result is 8=8 which means x=1 and y=4 worked for both equations. 

   

6 0
3 years ago
Need the answers before 8pm
saveliy_v [14]

Answer:

A reflection over the x- axis would be the correct answer.

Step-by-step explanation:

When you flip figure A over the x-axis it will land onto figure B.

5 0
4 years ago
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