9514 1404 393
Answer:
1.1 quarts
Step-by-step explanation:
Let x represent the amount to be added, in quarts. Then the amount of anti-freeze in the resulting solution is ...
0.20(8) + 1.00(x) = 0.30(8 +x)
0.70x = 0.10(8) . . . . . . subtract 0.20(8)+0.30(x)
x = 8/7 . . . . . . . . . . . . . divide by the coefficient of x
x ≈ 1.142857 ≈ 1.1
About 1.1 quarts of pure antifreeze must be added.
$580
Original price = $156.60 / 0.27
Original price = $580
the answer to this is
x=-1
y=-5
(7x+y)-(x+y)=-6
6x=-6
-1+y=-6
y = ( √ x − 5 , − √ x − 5 ) 2 − 4
Step by step by Explanation:
Solve for t by taking the square root of both sides of the equation.
