the upper quartile is the right line of the box.
the lower quartile is the left line of the box.
the median is the middle line of the box
nora has 4 goldfish while sammie has 3 times that amount, easy.
just multiply 4 and 3 together since it is 3x the amount of 4.
3 x 4 = 12
sammie as 12 goldfish while nora has 4.
now it wants the total.
so add both numbers.
4 + 12
and what do you get?
16 fishies in total.
5x-15 = -65
add 15 to each side
5x = -50
divide by 5 on each side
5x/5 = -50/5
x = -10