Answer:
x=3, y=2
Step-by-step explanation:
To solve by elimination method, multiply one of the equation by a constant such that when you subtract one equation from the other, you are left with one term only.
Let t and s represent the masses of 20% and 60% alloys respectively.
t+s=80, s=80-t
(0.2t+0.6s)/80=0.52 multiply both sides by 80
0.2t+0.6s=41.6, now using s=80-t in this equation gives us:
0.2t+0.6(80-t)=41.6 perform indicated multiplication on left side
0.2t+48-0.6t=41.6 combine like terms on left side
-0.4t+48=41.6 subtract 48 from both sides
-0.4t=-6.4 divide both sides by -0.4
t=16, since s=80-t
s=64
So 16kg of 20% alloy is mixed with 64kg of 60% allow to make 80kg of a 52% alloy.
Write an equation for the number of dollars, d, that you pay for your karate classes if you take classes for m months.
I am assuming the cost is 80 dollars per month
d = 80m
Answer:
a6=69
Step-by-step explanation: