Why was igor unhappy about his spelling test even though he got everything right?

Find the distance between the pair of points a(-1,8) and b(-8,4)

Travis and paula went to lunch. travis ordered a sandwich for $7.50 and paula ordered a burger for $5.25.after lunch, they left a 15% tip for the waiter. how many money did they spend altogether?

Which is the best estimate of the product of 0.9 x 0.88? 0 0.25 0.5 1