Answer:
12 nickels and 13 dimes
Step-by-step explanation:
d = # of dimes
n = # of nickels
Set up a System of Equations as follows:
d + n = 25
.10d + .05n = 1.90
now solve for 'd' or 'n' and use Substitution:
d = 25-n
.10(25-n) + .05n = 1.90
2.5 - .10n + .05n = 1.90
-.10n + .05n = -0.6
-.05n = -0.6
n = -0.6/-.05
n = 12
d + 12 = 25
d = 13
Check: 12(.05) + 13(.10) should equal 1.90
0.60 + 1.30 = 1.90
1.90 = 1.90
100*1.2828...= 128.28282828..( so on..)
100x=128.28
then you do 100x - x = 128.2828...- 1.2828..
then we subtract the .282828... part
99x = 127
then divide boths sides by 99 and then x=127/99
The graph is a horizontal line at 70 units above the x-axis and parallel to it. f(x) doesn't depend on the value of 'x'. It's always 70.
