Find the inverse of this 3x3 matrix. [1 5 2] [ 1 1 7] [0 -3 7]

What are the solutions to the equation 4x2+3x=24-x

Student price tickets to a movie are $1 and non student tickets are $2. 350 tickets are sold and the total amount made is $450. how many non student tickets were sold ? a) 100 b) 150 c) 200 d)250

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1