13 marks
a speed camera takes two photographs of a car
photo 1
-
h
0.8m
0.8*9=0
0.72 0.0
the avere
m/s is 1.4
photo 2 —
,
0.8m
photo 2 was taken 0.5 seconds after photo 1.
marks on the road are 0.8 metres apart
calculate the average speed of the car in m/s.

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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the one below it is a function