Simplify the expression below as much as possible. (9+81) + (4 - 7i) - (9-6i) O A. 4-5i O B. 4+9i O c. 4 + 21i O D. 4 + 7i​

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.