8(7b - 9) if be = 3 plz help I'm in 6th grade​

Nnnnneeedd 1.find the residual if you know the actual number is 5.2 and the predicted value is 4.8

Solve this 364x-64x=300x and 12(x2–x–1)+13(x2–x–1)=25(x2–x–1)

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units