Solve for the roots of xin each of the equations below.
a. x - 81 = 0
b. x + 10 x2 + 25 = 0
c. x - x2 - 6 = 0

Franco wants to double the volume of the cone. what should he do?

Graph red beads cost $1 an ounce and gold beads cost $3 an ounce. juanita wants to purchase a 12-ounce mixture of red and gold beads that she can sell for $2 an ounce. the solution of the system shows the number of beads needed for juanita to break even. x + y = 12, x + 3y = 24 how many ounces of red beads will juanita buy to break even? how many ounces of gold beads will she buy?

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