Answer:
x²+x-30
x=5
Step-by-step explanation:
The equation is
(x+3+x-1)/2 × x=30
x²+x-30 (it's the quadratic equation)
x²+6x-5x-30=0
x(x+6)-5(x+6)=0
(x+6)(x-5)=0
x=-6
It's impossible for Length to be negative
So x=5
If the gift card is $30 the remaining change is 3 dollars
true
Incorrect
The fraction of 6/12 all squared gives 36/144 36/36 and 144/36 reduces to 1/4.
