The length of the base of an isosceles triangle is x. The length of a leg is 5x - 5. If the perimeter is 144, solve for x.

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Aregular pentagon with a perimeter of 21 inches is dilated by a scale factor of 5/3 to create a new pentagon. what is the perimeter of the new pentagon?

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2