exam Maths Puzzle Numerical Ability

Find the slope of the line throught the following pairs of points.
(4,3) and (-5,3)

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exam Other Question

Can someone please help me simplify this problem I am failing my class .Thanks A MILLION?

12- √ [100] + 9� Hoe many pounds of hamburger that costs 1.60 per pound must be mixed with 70 pounds of hamburger that costs 2.10 per pound to make a mixture that costs 1.70 per pound.