What is a letter or symbol that represents some unknown value

Solve the equation and state a reason for each step. 8x - 4 = 5x + 8

Jackson paints every face of the cube what is the total surface area in square centimeters of the cube Jackson paints?

Randy wants to either ride share to work or drive his own car to work, but it is impossible for Randy to ride share and drive his own car in one trip. If the probability that Randy ride shares is 0.

Factor x^2-6x+9 A.) (x-3) B.) (x-3) (x+3) C.) (x-3) ^2 D.) (x+3) ^2

The leg of a right triangle is 3 units and the hypotenuse is 4 units. What is the length, in units, of the other leg of the triangle? square root of 5 square root of 7 5 7

Logan ate 1.438 pounds of grapes. His brother Ralph ate 1.44 pounds of grapes. Wich brother ate more grapes?

If x=11 units and h=7 units, then what is the area of the triangle shown above

What is when 12+21 to the 8th power

Eight times the sum of a number and six

What is the period of y=sin (3x)