Hallie used a birthday check her mother gave her to start a savings account. She plans to save $25 per month as well. After 9 months, hallow has $300. Write and solve a linear equation to find the original check amount from hallies mother.

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

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?

Write the summation to estimate the area under the curve y = 1 + x2 from x = -1 to x = 2 using 3 rectangles and right endpoints