Answer:
350 mL
Step-by-step explanation:
Let q represent the quantity (in mL) needed of the 70% solution. Then the total amount of mixture will be q+50 milliliters. The total amount of alcohol in the mixture will be ...
0.70q +0.30(50) = 0.65(50 +q)
.05q = 17.5 . . . . . . subtract (0.65q +1.50)
q = 350 . . . . . . . . . divide by 0.05
You will need 350 mL of the 70% solution.
Answer:23
Step-by-step explanation:
12 - 7 is 5. you can count down 7 times from 12 like: 12, 11, 10, 9, 8, 7, 6, 5.
Answer:
69
Step-by-step explanation:
Step 1:
483 ÷ 7 = 69
Step 2:
69 × 7 = 483
Answer:
69
Hope This Helps :)
Answer:
2x²+5x-6 = 0
using the quadratic formula
x = 0.886 and x= -3.386
