Gabriel is signing up for a gym membership with a one-time fee to join and then a monthly fee to remain a member. The the monthly fee is $40 and the one-time
joining fee is $100. Write an equation for C, in terms of t, representing the total cost
of the gym membership over t months.

Solve 2x+y=3 x+y=5 in substitution method

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?

2/3(-6y+9x) expand each expression using the distributive property