exam Maths Puzzle Numerical Ability

answer the question with the given quadratic equation and also sketch and label information on graph .
y = x^2-2x-8
opens: ?
Y-intercept : ?
vertex : ?
Axis of symm: ?
roots:

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exam Other Question

please help me solve the following equations:

1. -1 = -4/7t

2. -3/8w = -9

3. -3/15s = 4

4. -3x = 3/2
I hope this is posted in the correct place. I need some help I do not understand how to do this. Thanks for any help you can give.
solve by elimination process and type an ordered pair.
4x - 9y = 14.5
7y - 2x = -8.5