Ascientist has two solution which she labelled, solution a and solution b, each continue salt, she knows that solution a is 65% salt and solution b is 90% salt. she wants to obtained 40 ounce of mixture that is 75% salt, how many ounce of each solution should she use

A = oz of the solution A

b = oz of the solution B

The scientist knows that solution A is 45% salt and solution B is 95% salt. She wants to obtain 80 ounces of a mixture that is 65% salt.

a + b = 80

0.45a + 0.95b = 0.65*80

by solving the above system of equations you'll find····

a = 48 oz

b = 32 oz

~I hope this helped~

If it doesn't make since, I can try to switch up the wording ^^