Answer:
How can I help you?????????????
Andrea drove 50miles/hour
refer to pic for working
Answer:
The two polynomial CAN be
and
.
Step-by-step explanation:
Step 1: <u>Simplify the expression:</u>



Step 2: <u>Think of a random polynomial:</u>

Step 3: <u>Either add your "random polynomial" by </u>
<u> or subtract it.</u>
<u>I want to add it so...</u>

= 
Check by subtracting
and
.

- 
_____________________
<em><u>or </u></em>
<em><u /></em>
Let the speed for the first 12 mi be x mi/h, the speed for 18 mi was (x+4) mi/h
thus given that
time=distance/speed
the average time will be:
3=(12+18)/(x+x+4)
3=30/(2x+4)
solving for x we get
3(2x+4)=30
6x+6=30
6x=24
x=4 mi/hr
Answer: 12 mi/hr