B, and a student who spent 5.5 hours online would have a mood rating of about 2.
First we need to find x so 6x+8x+6x= 180
20x=180 and x= 9
So A= 6*9= 54
B= 8*9= 72
C= 6*9= 54
The parent function of any a quadratic function is
Somebody can estimate the length of a book by using a ruler and rounding it to the nearest whole number.
Answer:
-10
Step-by-step explanation:




so,a=-10