Answer:
Step-by-step explanation:
We can set up the following system of equations:
, where 
is the number of dimes she has and 
is the number of nickels she has.
Multiplying the second equation by -5 and adding both equations lets us isolate and solve for :
Plugging 
into any of the two equations will let us solve for :
.
Therefore, she has 14 nickels.
Answer:
5
Step-by-step explanation:
15/3 - 4/3 = 11/3
15/3 = 5
Answer:
C
Step-by-step explanation:
Make a system of equations.
Justin = j
Greg = g
j + 15 = g
g/2 + 75 = j
We can substitute.
(j + 15)/2 + 75 = j
j/2 + 15/2 + 75 = j
j/2 = 165/2
j = 165
Substitute back into j + 15 = g
165 + 15 = g
g = 180
Answer:
B. trapezoid
Step-by-step explanation:
The other three have two pairs of parallel sides
