The amount of the final solution is 4 + 1 = 5 quarts.
The amount of alcohol in the final solution is 5 * 0.36 = 1.8 quarts.
The concentration of alcohol in the 4 quarts of alcohol solution that was added is:
Answer:
#5a: After 3 weeks, they will have a total score of 415 points.
#5b: (Full work below) Kris' score: 520 ; Justin's score: 450
Step-by-step explanation:
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#5b FULL WORK BELOW
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x=number of weeks: 10
y= total score
Use your equations.
Kris will have 520 points.
Justin will have 450 points.
The mistake was in step one when she added the 9 to both sides
x^2 + 8x - 9 = 0
__ + __ = 8 (b)
__ • __ = -9 (a•c)
blanks = -1 and 9
(x - 1)(x + 9)
Solve for x in each one
x = 1 or -9
14 7/10 2
I do not know the rest, sorry.
Hope I helped!
=)
15% of 420
That is 0.15 of 420
that is 0.15 * 420
that is 63
Hope this helps :)