Mischa wrote the quadratic equation 0 = –x2 + 4x – 7 in standard form
The standard form of quadratic equation is

When y=0 then the standard equation becomes

Now we compare the given equation
with
and find the value of a, b,c
-x^2 can be written as -1x^2
a= -1 , b=4 and c=-7
The value of c is -7
Answer:
7×17/49
Step-by-step explanation:
90/7 × 4/7
90×4 / 7×7
360/49
7 17/49
She will have 6 braces left over since 8x8=64 and 70-64=6