Answer:
8
Step-by-step explanation:
2/3 / 1/12
flip sign and 2nd number
2/3 x 12/1
=8
Answer:
Therefore, there 16 chances of getting a spade OR a five.
Step-by-step explanation:
Answer:x= 14
Step-by-step explanation:
84
Answer:
C) v≤-5
Step-by-step explanation:
Divide each side by 4,
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.