Which expression is equivalent to 20x−8y 1. 2(10x+4y)

2. 4(5x−8y)

3. 4(5x−2y)

4. x(20−8y)

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.