how to solve equations

3y-2x=11

y+2x=9

The sum of two numbers is 72 and one of them is five times the other

3. which of the follow ordered pairs lies in quadrant ll. a. 4 - 3 b.-2-5 c.-1 - 2 d. 3,0

Evaluate. 8.76 + (-3.05) a. - 11.81 b. - 5.71 c. 5.71 d. 11.81

A man who moves to a new city sees that there are two routes he could take to work. A neighbor who has lived there a long time tells him Route A will average 5 minutes faster than Route B. The man decides to experiment.

Estimate the quotient 5.94/3=198

The real number 8.09 belongs to which set of number A. natural numbers B. irrational numbers C. integers

8. 72 is what percent of 45?

Let f (x) = x^2 - 2x + 2 and g (x) = x - 3. find f (x) times g (x)

A survey found that 9 out of 100 people are left-handed. On the basis of this survey, how many people in a group of 8000 are likely to be left-handed? A. 900 B. 800 C. 720 D. 72

If 80% of an item is $200.00 what is the original cost