9514 1404 393
Answer:
- 100 mL of 75% solution
- 150 mL of pure alcohol
Step-by-step explanation:
Let x represent the quantity (in mL) of pure alcohol needed for the mix. Then the amount of 75% needed is (250-x). The amount of alcohol in the mixture is ...
1.00x +0.75(250 -x) = 0.90(250)
0.25x +187.5 = 225 . . simplify
0.25x = 37.5 . . . . . . . . subtract 187.5
x = 150 . . . . . . . . . . . . . divide by 0.25
(250 -x) = 100 . . . . mL of 75% solution
You need 100 mL of the 75% solution and 150 mL of pure alcohol to obtain the desired mixture.
Answer:
-18
Step-by-step explanation:
*2, *(-2), *2, *(-2) ...
Step-by-step explanation:
✓2 × ✓2 = ✓2×2 = ✓4 = 2
✓5 × ✓7 = ✓5×7 = ✓35
✓2 × ✓18 = ✓2×18 = ✓36 = 6
✓2 × ✓6 = ✓2×6 = ✓12 = ✓4 ×✓3 = 2✓3
Answer:
Step-by-step explanation:
the local maxmium of the place defines on its own
Answer:
Step-by-step explanation:
Do you mean
divide 6300 between two persons in the ratio 2 to 5?
If so, then there will be a total of 7 parts
6300/7 = 900
2(900) = 1800
5(900) = 4500
