Says find the missing angle pls help

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x

The dash figure is a dilation if the original figure. find the scale factor. classify the dilation as an enlargement or a reduction