Kate has gone up to the chalkboard to do math problems 5 more times than andre. kate has gone up 11 times. which equation represents this situation?
a- a - 11 = 5
b- 5a = 11
c- a - 5 = 11
d- a + 5 = 11

If a and b are the measures of two first quadrant angles and sin a = 4/9 and sin b = 2/5 find sin(a+b).

Can someone me with this problem . show your work .

The distribution of a sample of the outside diameters of pvc pipes approximates a symmetrical, bell-shaped distribution. the arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. about 68% of the outside diameters lie between what two amounts?