exam Maths Puzzle Numerical Ability

please help me solve the following equations:

1. -1 = -4/7t

2. -3/8w = -9

3. -3/15s = 4

4. -3x = 3/2

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exam Other Question

I have an equation of 4x=36 I looked at other examples of how to do it but I dont seem to understand how to figure it out, v/3 = -11 this is another one as well this is on a worksheet not a textbook 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: