9. a)
A football is kicked into the air. It's height in meters after t seconds is given by h(t) = -4.2(t – 3.2)2 + 25.
What was the height of the football when it was kicked?
I
b)
What was the maximum height of the ball?
At what time was the maximum height reached?
c)
How high was the ball after 1 second?
d)
Was the ball still in the air after 5 seconds?
0

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step-by-step explanation:

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w