2r2 + 3r – 1=0
solve using the quadratic equation

Can someone me out here number 4 plz

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.