Y=x-8 y=-2x+1 how do you solve the system of equation

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.

Brent paid for 6 avocados with a $20.00 bill. he received $10.40 in change. construct and solve an equation can be used to find the price , of each avocados