The length of time of the school field day was decreased from 100 minutes to 80 minutes. What is the percent
decrease in length of time of the school field day?

The height of a triangle is 4 in. greater than twice its base. the area of the triangle is no more than 168 in.^2. which inequalitycan be used to find the possible lengths, x, of the base of the triangle?

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

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18