Answer:
B
Step-by-step explanation:
Let the nickels = x
Let the dimes = y
You don't know the total value of either. Nor do you know the total number of either.
You only know the total value of both together.
7.80 added to anything makes it bigger than 7.80 A is wrong.
y cannot be alone it should be multiplied by 0.5 C is wrong
D is wrong for the same reason A is
B is the correct answer. That is the way you write the problem
Number of Coins and value on one side. Total on the other.
Answer:

Step-by-step explanation:

The answer should be -192. I could explain in the comments if you would like. :)
The pieces shown are like all of 8 slices of a pizza.
the area of cirlce = area of the rectangle formed by rearranging the pizza slices.
= (pi*r)*r
Answer:
101 is B. Whole Number but is C. Integer too
Step-by-step explanation:
Whole number is starting from 0 counting up to forever
Integer is all whole numbers but there are negative numbers too