Which undefined term can contain parallel lines? Line Plane Point Or Ray

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

Agroup of three friends order a combo meal which includes two slices of pizza and a drink each drink is priced at $2.50 the combined total of $31.50 how much is the cost of a slice of pizza