Answer:
x=3,y=0
x=-1,y=0
Step-by-step explanation:
We will have to factorise to get the value of x before solving for y
Let's solve
y=x^2-2x-3
To factorise x
x^2-3x+x-3
x(x-3)+1(x-3)
(x-3)+(x+1)
x-3=0
x=3
x+1=0
x=-1
Let's substitute the value of value to get the value for y
y=x^2-2x-3
When x is 3
y=3^2-2(3)-3
y=9-6-3
y=0
When x is-1
y=(-1)^2-2(-1)-3
y=1+2-3
y=0
Therefore when x is 3,y is 0
When x is -1,y is 0
The amount saved by Rita is $25.
Given that, the skateboard Rita wants to buy is 6 dollars less than 3 times the amount she has saved. The skateboard is 69 dollars.
<h3>What is an equation?</h3>
In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
Let the unknown number be x.
Now, 3x-6=69
⇒ 3x=75
⇒ x=75/3
⇒ x= 25
Therefore, the amount saved by Rita is $25.
To learn more about an equation visit:
brainly.com/question/14686792.
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"Your question is incomplete, probably the complete question/missing part is:"
The skateboard Rita wants to buy is 6 dollars less than 3 times the amount she has saved. The skateboard is 69 dollars. How much has Rita saved.
Answer:
3
Step-by-step explanation:
