So you follow PEMDAS
So we start with the exponent which is -X^2 so it would turn into X
Now we have X+4=10
We bring the four over and we get X=6
Hope this was helpful and ask questions if you still need help:)
(distribute)
(collect like-terms)
(we flipped the sign because we divided by a negative)

Answer:
$12.86
Step-by-step explanation:
multiply 13.50 by 0.05 and subtract the answer from 13.50