Prove that isosceles triangles are congruent if the base and the base angle of one triangle are congruent to the base and the base angle of the other triangle.

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?

14+2 (56-1) this is an arithmetic sequence