Answer:

Step-by-step explanation:
We are given that
Distance traveled by a toy car

Where t>3
Time taken by car =t-3 seconds
We have to find the expression which represents the speed of the toy car.
We know that

Using the formula




Hence, the expression which represents the speed of the toy car

Formula used for an equilateral triangle is
Root3 a^2/4
Hope this helps.!!
Answer:
7
Step-by-step explanation:
f(-1)=-1*(-1)*2-3*(-1)+2 → f(-1)=2+3+2 → f(-1)=7
Answer: -x + 4y
Step-by-step explanation:
-3(2x-y) + 2y+2(x+y)
-6x + 3y + 2y + 2x + 2y
-6x + 2x +3y + 2y + 2y
-6x + 5x + 4y
-x + 4y