Und 2020 Problem B.4
Pre-Final
You have given an equal sided triangle with side length a. A straight line connects the center
of the bottom side to the border of the triangle with an angle of a. Derive an expression for
the enclosed area A(a) with respect to the angle (see drawing).
A
А A
ernational Youth Math Challenge

The box plots show the distributions of the numbers of words per line in an essay printed in two different fonts.which measure of center would be best to compare the data sets? the median is the best measure because both distributions are left-skewed.the mean is the best measure because both distributions are left-skewed.the median is the best measure because both distributions are symmetric.the mean is the best measure because both distributions are symmetric

The graph below shows the line of best fit for data collected on the number of cell phones in cell phone cases sold at the local electronic store on four different days

Explain how you can show five less than a number using algebraic expression