Answer:
the answer should be 2,401 were going to St. Ives
Step-by-step explanation:
7 times 7 times 7 times 7 is 2401
Answer:
Step-by-step explanation:
Express as product of prime factors.
The greatest common factor is the product of the least powers of the common factors.
The GCF is
Answer:
2
Step-by-step explanation:
1 gallon = 4 quarts
2570 x 4 = 10,280 quarts of gas
10280/7 = 1468.571 quarts per day
rounded to nearest hundredth is 1468.57 quarts
Answer:
Step-by-step explanation:
26% is (26-20)/(50-20) = 6/30 = 1/5 of the way between 20% and 50%. That means 1/5 of the solution is 50% acid.
50% acid: 1/5 · 100 mL = 20 mL
20% acid: 100 mL -20 mL = 80 mL
Delbert must mix 80 mL of 20% acid and 20 mL of 50% acid.
_____
Maybe you'd like to see an equation. Let x represent the amount of 50% acid required. Then 100-x is the amount of 20% acid needed. The amount of acid in the mix is ...
0.50(x) +0.20(100 -x) = 0.26(100)
(0.50 -0.20)x = (0.26 -0.20)100 . . . . subtract 0.20(100)
x = (0.26 -0.20)/(0.50 -0.20)×100 = 20
This last expression should look a lot like the one we started with in this answer. It shows you how you can almost write down the answer to mixture problems without a lot of work.
