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salantis [7]
3 years ago
11

I am supposed to write and solve an equation.

Mathematics
2 answers:
Natalka [10]3 years ago
8 0
The first one is 17.7

The second one is 84.

What I think it is saying is what number plus 5.4 or 29 is the second number. So for the first one, you would subtract 5.4 from 23.1 to get 17.7, and for the second one it would be 113.

Hope this helps!
Sholpan [36]3 years ago
5 0
1. 23.1 - 5.4 = 17.7
2. 113 - 29 = 84
I think these are the answers if I interpreted the question correctly. Hope this helps!
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Step-by-step explanation:

f(x)=x^2-2x+3\to y=x^2-2x+3\\f(x)=-x+5\to y=-x+5\\\\\left\{\begin{array}{ccc}y=x^2-2x+3&(1)\\y=-x+5&(2)\end{array}\right

substitute (1) to (2):

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x^2-2x+x+3=-x+x+5

x^2-x+3=5        subtract 5 from both sides

x^2-x+3-5=5-5

x^2-x-2=0\\\\x^2+x-2x-2=0\\\\x(x+1)-2(x+1)=0\\\\(x+1)(x-2)=0\iff x+1=0\ \vee\ x-2=0\\\\\boxed{x=-1\ \vee\ x=2}

substitute the values of x to (2):

x=-1\\\\y=-(-1)+5=1+5=6\\\\\huge\boxed{(-1,\ 6)}\\\\x=2\\\\y=-2+5=3\\\\\huge\boxed{(2,\ 3)}

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