thelongneckkid
13.07.2020 •
Mathematics
Find the solution to the system of equation select all that apply y=x^2-4 y=2x-5
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Ответ:
Explanation: Use the method of substitution we get:
y = x^2-4
y = 2x-5
By substitute:
x^2-4=2x-5
Then we can solve the equation for x
x^2-4-2x+5=0
x^2-2x+1=0
Now solve the quadratic equation by factoring we get:
x^2-2x+1=0
(x-1)(x-1)=0
x-1=0
x = 1
Now that we have found x we can substitute x to the equation:
y = x^2-4
y=1^2-4
y=-3
y=2x-5
y=2(1)-5
y=-3
So there you have it :)
Ответ:
3/5= 0.6
2/3= 0.666666666666666666
7/8= 0.827
2 2/3= 2.66666666666666666
4/9= 0.4444444444444444444
13/15= 0.866666666666666666