4. tristan has a total of 30 dimes & nickels. the total value
of the coins is $2.50. how many nickels does he have?

x/2 + x = 30 -> $2.50

20/2 + 20 = 30

X = 20, therefore:

dimes = 20

nickels = 10

20 dimes and 10 nickels

Step-by-step explanation:

There’s 20 dimes 20x.10= 2.00 that leaves 10 nickels 10x.05=.50 2.00+.50=2.50

y=mx+b is the final answer!   : )

anser is a

step-by-step explanation:

negitive slope