Rearrange
a= 1/2(a+b)h
to make h the subject

Find a number such that if you add 8 and divide the result by 4 you will get the same answer as if you subtracted 3 from the original number and divided by 2

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)

#5 points possible: 3. total attempts: 5 using your calculator, find the range and standard deviation, round to two decimals places: the table below gives the number of hours spent watching tv last week by a sample of 24 children. 76 57 89 73 88 42 31 46 80 42 38 57 49 50 89 36 69 82 27 88 39 89 95 18 range = standard deviation =