Answer:
6.
Step-by-step explanation:
We can start by defining a couple things.
x = amount of nickels
y = amount of dimes
Since he has the same amount of each, we can say this.
x = y
And because we know it totals 0.90, we can say this.
0.05x + 0.10y = 0.90
then, we substitute and get this.
0.05x + 0.10x = 0.90
Simplify.
0.15x = 0.90
Divide both sides by 0.15.
x = 6
So we have 6 nickels, and they both are the same, so we have 6 dimes.
Answer:
8
Step-by-step explanation:
8+8=16
or
16 divided by 2= 8
Perimeter is sum of all the sides ,
so, perimeter will be 7 + 9 + x = 16 + x
it will be more than 16 for sure
Answer:
the x is 3 and the y is -3
Step-by-step explanation:
