Five whole numbers are written in order.

4

7

x

y

11
The mean and median of the five numbers are the same.

Work out the values of
x
and
y
.

(3 marks)

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?