Let X represent the number of pennies.
Let Y represent the number of nickels.
We know that X + 5Y = (Y + 5X) + 80.
4Y = 4X + 80
Y = X + 20
Hence, the difference between the number of pennies and the number of nickels is 20.
Answer:
75.39 in^2
Step-by-step explanation:
circumference=2πr
30.8=2(3.14)r
30.8=6.28r
4.9=r
Now that we know the radius, we can plug it in for the area equation
area=πr^2
area=(3.14)(4.9)^2
area=(3.14)(24.01)
area=75.39 in^2
Answer:
(negative1,3)
Step-by-step explanation:
graph the equations and find where they meet
The x-coordinate is 2 and y-coordinate is 12.
Substitute 2 into x then check if y is equal to 12.
D is the answer since y = (2) - 10 = -8, not 12.