In a certain chemical, the ratio of zinc to copper is 3 to 17. A jar of the chemical contains 357 grams of copper. How many grams of zinc does it contain?

Solve the system of equations. y= 2x y= x^2 - 15

In the figure below, segment ac is congruent to segment ab: triangle abc with a segment joining vertex a to point d on side bc. side ab is congruent to side ac which statement is used to prove that angle abd is congruent to angle acd? segment ad bisects angle cab. triangle acd is similar to triangle abd. segment ad is congruent to segment ac. angle cab is congruent to angle cba.

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?