He can use his debit card to purchase the bike now. (Not an option)
Answer:
(5y-2)x(2x+5)
Step by step explanation:
10xy-4x+25y-10
Factor out 2x from the expression
2x*(5y-2)+25y-10
Factor our 5 from the expression
2x*(5y-2)+5(5y-2)
Factor out 5y-2 from the expression
(5y-2)x(2x+5)
2 63/100
(2 and 63 hundredths)
We need to find the derivative of that equation with respect to x. The derivative of x^3 is 3x^2, the derivative of 3x^2 is 6x, and the derivative of any constant is always 0. Use the power rule for derivatives that says

. Our derivative, then, is

.