Someone pls help i’m begging you

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

What is the value of the expression below? 148+(-6)| + |– 35= 7|

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.