Step-by-step explanation:
(92-3)x2=184 is the answer
Answer:11 is q2 12 is 3/4
Step-by-step explanation:
Answer:
First brand of antifreeze: 21 gallons
Second brand of antifreeze: 9 gallons
Step-by-step explanation:
Let's call A the amount of first brand of antifreeze. 20% pure antifreeze
Let's call B the amount of second brand of antifreeze. 70% pure antifreeze
The resulting mixture should have 35% pure antifreeze, and 30 gallons.
Then we know that the total amount of mixture will be:
Then the total amount of pure antifreeze in the mixture will be:
Then we have two equations and two unknowns so we solve the system of equations. Multiply the first equation by -0.7 and add it to the second equation:
+
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We substitute the value of A into one of the two equations and solve for B.
Answer:
1. 48.5÷7
Step-by-step explanation:
4.85÷0.7
We can multiply both terms by 10 without changing the division problem
4.85 * 10 = 48.5
.7 * 10 = 7
48.5 ÷ 7 is the same as 4.85 ÷ .7