If the bases of an isosceles trapezoid have lengths of 13 and 26, what is the length of the median?
A. 6.5 units
B. 39 units
C. 13 units
D. 19.5 units

What is the vertex form of f(x) = x2 + 6x + 3

Asalesperson earns $320 per week plus 8% of her weekly sales. the expression representing her earnings is 320 + 0.08x. which of the following describes the sales necessary for the salesperson to earn at least $1000 in the one week?

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil