Let e be the amount of 1.35 beans and c be the amount of 1.05 beans...
(1.35e+1.05c)/120=1.15 we know e+c=120, so e=120-c making the equation:
(1.35(120-c)+1.05c)/120=1.15
(162-1.35c+1.05c)/120=1.15
162-0.3c=138
-0.3c=-24
c=80, and since e=120-c, e=40 so:
80 lb of the $1.05 beans are mixed with 40 lb of the $1.35 beans to produce a 120 lb mixture worth $1.15 per pound.
Answer:
13421+402
Step-by-step explanation:
Y=mx+b
m is the slope
you need to get y on one side and all other numbers on the other
so here's the easiest way to do it:
just kinda take 4x (which is a positive number) and move it to the other side and change the sign. so then it turns into 6y=-4x+24 and then you divide both sides by 6 so then you get y=-4/6x+4 (4 over 6 like a fraction)
-4/6 is the slope
Answer = 2x^2+6x+1
3x+2+2x^2+3x-1
3x+1+2x^2+3x
Now combine like terms
3x+1+2x^2+3x
6x+1+2x^2
Rearrange terms
6x+1+2x^2
2x^2+6x+1
Answer:
25 minutes.
Step-by-step explanation:
Unit rate = 45/15 = 3 cents / minute.
So she pays 3 cents for 1 minute
and for 75 cents she can talk for 75 * 1/3 = 25 minutes.
