I NEED HELP, What is 2 plus 2. divided my 7. My teacher said its has to be a whole number!!!

Use the quadratic formula to solve 5x=6x^2-3,what are the values of x?

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

Which expression is equivalent to 16 in exponential form? a) 4 × 4 b) 8 × 2 c) 23 d) 24