18. The radius of a circle is increasing at a constant rate of 3 cm per second. What is the rate of increase (at any point) of the area of the circle?

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

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.

10% of 1,900,000. show me how you got the answer