BRAINLIEST TO THE BEST ANSWER what is the solution to this system of equations?
15x-15y=15
y= 8x-10/-2

a. (-3,7)
b. (7,-3)
c. (3,-7)
d. (-7,3)

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500