Can you guys tell me this is very important

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

Grant simplified the expression 1.5(-3.2 + 2.5) his work is shown below explain the error in grants work

Complete the frequency table: method of travel to school walk/bike bus car row totals under age 15 60 165 age 15 and above 65 195 column totals 152 110 98 360 what percentage of students under age 15 travel to school by car? round to the nearest whole percent.