-->Write in standard a+bi form.
a. 9
b. 10i
c. 7i+ 4
d. 2+i
e. -5i + 6

Part a : solve - vp + 40 < 65 for v . part b : solve 7w - 3r = 15 for r show your work!

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?