Which equation represents a line that is parallel to the line with equation y = 2x + 1? A. y = −2x + 1
B. 2x + y = 7
C. −2x + y = 2
D. −2x − y = 9

Water flows at a steady rate from a tap. its takes 40 seconds to fill a 4 litre watering can from the tap. the rate at which water flows from the tap is halved. complete: 4 litres into cm3

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?