What is the solution to the system? use elimination .

Question

-18.6x+ 17.2y=90.2

14.2x+ 3.4y= -35.8
a.(3,2)
b.(-3,2)
c.(2/3,4/9)
d.(2,3)
IS IT D??

Terry and ed start a lawn mowing business and purchase mowers and equipment for $800. They charge $20 for each lawn and $4 worth of gas for each job. How many laws must Terry and Ed mow before breaking even?
a .34 lawns
b. 40 lawns
c. 50 lawns
d. 20 lawns
IS IT A ????

At the local ballpark, the team charges $5.00 for each ticket and expects to make $1,300.00 in concessions. the team must pay in players $1,800.00 and pay all the workers $1,500.00. Each fan gets a free bat, costs the team $3.00 per bat of the following, what is the smallest number of tickets that must be sold to break even???
a. 2,300 tickets
b. 400 tickets
c .250 tickets
d. 1,000 tickets
IS IT D????

A restaurant has one type of lemonade that has 12% sugar and another that is 7% sugar. How many gallons of each does the restaurant need to make 20 gallons of a lemonade mixture that is 10% sugar?
a. 12 gallons of the 12% lemonade and 8 gallons of the 7% lemonade.

b.10 gallons of the 12% lemonade and 10 gallons of the 7% lemonade.

c.8 gallons of the 12% lemonade and 12 gallons of the 7% lemonade.

d.2 gallons of the 12% lemonade and 18 gallons of the 7% lemonade.

IS IT D ?????

A science teacher has supply of 50% methane solution and a supply of 80% methane solution.How much of each solution should the teacher mix together to get 105 mL of 60% methane solution for an experiment.
a. 70 mL of the 50% solution and 35 mL of the 80% solution

b. 35 mL of the 50% solution and 70 mL of the 80% solution

c. 62 mL of the 50% solution and 43 mL of the 80% solution

d. 43 mL of the 50% solution and 62 mL of the 80% solution

IS IT C????