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: 28 Brownies and 38 Cookies
Let say the brownies sold for B amount and cookies for C amount. There were 10 more cookies sold than brownies. If brownies sold X piece then, total sales would be:
Sales: (X+10) C + XB
Total sales is $40. Cookies sold for $0.50 each. Brownies sold for $0.75 each. If you insert it all to the first equation, it would become:
$40= (X+10) x $0.50 + $0.75X
$40= $0.50X + $5 + $0.75X
40= 1.25X + 5
1.25X= 35
X= 35 / 1.25= 28
Brownies sold at 28 pieces. Cookies sold at: 26+10= 38 pieces.
Answer:
store A- 4
Store B-1
Store C-3
Store D- 2
Step-by-step explanation:
gotta help a brotha out if i was correct Drop a sub at iToxicMakersYT
1 fluid ounce
1000= 0.1
when you add zeros you move the decimal point over to the left making it
10,000= 1fluid ounce
51 - 3 = 48
48 / 4 = 12
the answer is 12 days
hope it helped :)