exam Maths Puzzle Numerical Ability

Suppose that the temperature outside is dropping at a constant rate. At noon, the temperature is 70oF and it drops to 58oF at 5:00 pm. How much did the temperature drop each hour?

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exam Other Question

Ttiangle LMN has vertices L(-6,5),M(-4,-3),N(-2,4). Find the coordinates of the vertices of its image after it is reflected over the x-axis and then translated by(-3,0) HELP!!!! it says identify the axis of symmetry, create a suitable table of values, then sketch the graph.
y=-x^2+3x-3
I am so lost when it comes to these! Your help would be greatly appreciated!
Thanks
CH