SOLUTION: Hello could someone please help me with this equation, I am so stuck! I have tried to make a formula but it is not working. I tried (x*.2)+(y*.5)=25.30 but this formula does not in
Algebra.Com
Question 602173: Hello could someone please help me with this equation, I am so stuck! I have tried to make a formula but it is not working. I tried (x*.2)+(y*.5)=25.30 but this formula does not include the 68 because I do not know where to put it. The equation is below.
Mike saves all his 50 cent & 20 cent coins. When he counts them he finds he has 68 coins amounting to $25.30. How many of each type of coin does he have?
Found 2 solutions by Alan3354, mananth:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Mike saves all his 50 cent & 20 cent coins. When he counts them he finds he has 68 coins amounting to $25.30. How many of each type of coin does he have?
------------
f + t = 68
50f + 20t = 2530
=======
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
x 20 cent coins
y 50 cent coins
Total attended
1 x + 1 y = 68.00 .............1
0.20 x 0.50 y = 25.30 .............2
Eliminate y
multiply (1)by -0.50
Multiply (2) by 1.00
-0.50 x -0.50 y = -34.00
0.20 x + 0.50 y = 25.30
Add the two equations
-0.30 x = -8.70
/ -0.30
x = 29.00
plug value of x in (1)
1.00 x + 1.00 y = 68.00
29.00 + 1.00 y = 68.00
1.00 y = 68.00 -29.00
1.00 y = 39.00
y = 39.00
29 20 cent coins
39 50 cent coins
m.ananth@hotmail.ca
RELATED QUESTIONS
Hello, If someone could please please help me out with this problem. I tried yo figure it (answered by stanbon)
Hello, I am having a problem finding the equation for a hyperbola. I have tried to work... (answered by lwsshak3)
Hello, I was wondering if you could help me with this math problem. The question is "Pure (answered by ptaylor,jim_thompson5910)
Hello,
I am trying to graph the following but I been out of school for 15 years can... (answered by stanbon)
Hello
I'm really stuck on this question and would be very grateful if you could help... (answered by jim_thompson5910)
Could someone please help me out with this one? I am suppose to evaluate this expression... (answered by AnlytcPhil)
Hello, I'm trying to solve a math problem based on polynomials. My teacher recently had a (answered by josgarithmetic)
Hi- my class is working on Equestions with Variables/ Decimals/ Fractions. I honestly do... (answered by checkley71)
Good afternoon,
I was wondering if someone could help me solve this equation. I tried to (answered by richwmiller,MathTherapy)