.................F^-1 (x) =x/3-2/3 .................
Answer:a and d
Step-by-step explanation:took the test
Answer:
-5.2
Step-by-step explanation:
15.6/-3= - 15.6/3= -5.2
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
100% - 65% - 20% = 15% girls.
15% = 0.15
820 * 0.15 = 123 girls
