Karen is buying pens and pencils for the new school year. she wants to have no more than 25 writing utensils in all. she also wants the number of pencils to be greater than or equal to the square of 3 less than the number of pens. create a system of inequalities to model the situation above, and use it to determine how many of the solutions are viable.

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

Find the values of y: 3y^3(y^2+ 2/3y)=0

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers