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allochka39001 [22]
3 years ago
14

X^2-7x=18 solve for x please show work

Mathematics
1 answer:
zloy xaker [14]3 years ago
3 0
So the answer is, x1=-2, x2=9
x^2-7x=18
x^2-7x-18=0
x^2+2x-9x-18=0
x*(x+2)-9(x+2)=0
(x+2)*(x-9)=o
x+2=0
x-9=0
X=-2
X=9
I hope u understand!
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Stacy is selling tickets for the school play. She has a total of 200 seats available, and there will be two types of tickets off
Ganezh [65]

She sold 74 child tickets and 126 adult tickets

Step-by-step explanation:

Stacy is selling tickets for the school play

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We need to find how many of each ticket  she sold

Assume that x is the number of child tickets and y is the number of the adult tickets

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- Add x and y, then equate the sum by 200

∴ x + y = 200 ⇒ (1)

∵ She sold each child ticket for $6

∵ She sold each adult ticket for $10

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Now we have a system of equation to solve it

Multiply equation (1) by -10 to eliminate y

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∴ y = 126

She sold 74 child tickets and 126 adult tickets

Learn more:

You can learn more about the system of equations in brainly.com/question/2115716

#LearnwithBrainly

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The other endpoint (x,y)
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