The system of linear equations can be used to find the number of nickels, n, and the number of quarters, q, yolanda used is n + q = 28
n + q = 280.05n + 0.25q = 4
<h3>Simultaneous equation</h3>
n + q = 28
0.05n + 0.25q = 4
n = 28 - q
0.05n + 0.25q = 4
0.05(28 - q) + 0.25q = 4
1.4 - 0.05q + 0.25q = 4
- 0.05q + 0.25q = 4 - 1.4
0.20q = 2.6
q = 2.6 / 0.20
q = 13
Substitute into
n + q = 28
n + 13 = 28
n = 28 - 13
n = 15
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Answer:
Step-by-step explanation:
Add the equations. So, y/b will be eliminated.
x= 2a
Substitute x = 2a in equation((i)
y = - 2b
Answer:
9
Step-by-step explanation:
the total ration is 8
the number of women = (3/8) x 24
= 9