Please solve this I am sooo confused help m please please please. I will give you 15 points.

Solve the system of the equations:

a.)
3(x+y)−7=12x+y
6(y−2x)−1=−45x

b.)
5(x+2y)−3=3x+5
4(x−3y)−50=−33y

c.)
4x+1=5(x−3y)−6
3(x+6y)+4=9y+19

You are on a cycling trip around europe with friends. you check the weather forecast for the first week. these are the temperatures for the week. sun mon tues wed thurs fri sat 16°c 20°c 24°c 28°c 28°c 23°c 15°c what is the mean temperature forecast for the week?

Find the product with the exponent in simplest form. then, identify the values of x and y. 6 ^ 1/ 3 • 6 ^ 1 /4 = 6 ^ x/ y

Ahealth-food producer has 250 samples of a new snack to distribute in the mall. the producer has to keep at least 50 samples for display in the health food for the product launch. how long will the samples last if consumers are taking the samples at a rate of 25 every hour