Eden has 12 erasable pens. After she gave 4 of her pens to David, she has 8/12 of her pens
left. What fraction of her pens did she give away? Write the answer in simplest form.

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Lems1. the following data set represents the scores on intelligence quotient(iq) examinations of 40 sixth-grade students at a particular school: 114, 122, 103, 118, 99, 105, 134, 125, 117, 106, 109, 104, 111, 127,133, 111, 117, 103, 120, 98, 100, 130, 141, 119, 128, 106, 109, 115,113, 121, 100, 130, 125, 117, 119, 113, 104, 108, 110, 102(a) present this data set in a frequency histogram.(b) which class interval contains the greatest number of data values? (c) is there a roughly equal number of data in each class interval? (d) does the histogram appear to be approximately symmetric? if so,about which interval is it approximately symmetric?

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)