What value can be substituted for x to make the equation true? 14 + x = 25
A. x =1
B. x=5
C. x=11
D. x=39

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

How do you use the elimination method for this question? explain, because i really want to understand!

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs