Answer:
There would be 30 nickels and 78 quarters.
Step-by-step explanation:
To find this, start by creating a system of equations in which x is the number of nickels and y is the number of quarters. Make the first equation the total number of coins.
x + y = 108
Make the second equation based on the value.
.05x + .25y = 21
Now multiply the second equation by -4 and add together to get the y value to cancel.
x + y = 108
-.2x - y = -84
--------------------
.8x = 24
x = 30
Now use this value to find y.
x + y = 108
30 + y = 108
y = 78
Answer:
i believe the answer will be 23
Answer:
12.6
Step-by-step explanation:
f(-4.5) means "what is the y-value when x equals -4.5?"
We see that when x = -4.5, our y or f(x) value is 12.6
I believe the answer is C.
93.53 - 21.41 = 72.12
If you simplify C, its answer becomes equivalent to the answer of the original problem:
(90 - 20) + (3 - 1) + (0.5 - 0.4) + (0.03 - 0.01)
70 + 2 + 0.1 + 0.02
72.12
