Which set of measurements would create a triangle?

a.
2 cm, 4 cm, 6 cm

b.
5 cm, 6 cm, 7 cm

c.
6 cm, 8 cm, 15 cm

d.
7 cm, 8 cm, 16 cm

The table respent two linear functions the equation respented by the first tables is given

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?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base