Answer:
150 mL
Step-by-step explanation:
Let x represent the quantity of 75% solution needed. The total amount of alcohol in the 60% mixture will be ...
75%·x + 10%·45 = 60%·(x+45) . . . . . there will be x+45 mL of solution in the end
0.15x = 22.5 . . . . . . . . . . . . . . . . . . . . simplify, subtract .60x+4.5
22.5/0.15 = x = 150 . . . . . . . . . . . . . . mL of 75% solution needed
You will need 150 mL of the 75% solution.
32.6 0.61
+3.54 x 0.45
--------- ----------
36.14 305
+ 2440
91.125 all you need to do is cube 4.5 or multiply 4.5 by itself 3 times so 4.5x4.5x4.5
Mariner Valley is approximately 7.31 kilometers longer than the Grand Canyon.
32 · 35 simplified is 1120.
Are you sure you have the correct choices om your problem?
I would say -26 because -22, -24, -26=-72
