A: 6x - 3y = -4
B: -4x - y = 5

To solve this system of equations by elimination, what could you multiply each equation by to cancel out the y-variable ?

A) multiply A by 2 and B by 3

B) multiply A by 1 and B by -3

C) multiply A by 3 and B by 2

D) multiply A by 1 and B by -2

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?

What’s the answer ? use the picture to see the problem

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)