exam Maths Puzzle Numerical Ability

Find the slope of any line perpendicular to the line through points (0, 5) and
(-3, -4).
please...

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exam Other Question

There are 132 more silver dollars than 50-cent pieces.
The ratio of the silver dollars to 50-cent pieces is 5:2.
So how many of each coin are there? Which of the following assumptions are required for ANOVA?
A) Each population is normally distributed
B) The populations have equal variances
C) The errors are both random an