Which expression can be written as  5 ⋅ ( 2 + 7 )? a) 5 * 2+7 b) 5 - (2+7) c) (5*2) + (5*7) d) (5+2) + (5+7)

How to solve a simultaneous equation involved with fractions?

1- 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.2- 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 the first question?

Mr. thompson is on a diet. he currently weighs 260 pounds. he loses 4 pounds per month. what part of the story makes the relationship not proportional?