Dylan needs to buy new contact lenses. His ophthalmologist sells 16 lenses for $64 and 40 lenses for $120. Which is better?

The better unit rate deal is 40 lenses for 120 dollars.

Step-by-step explanation:

64/16 = 4 while 120/40 = 3

so the best one to buy is 40 contact lens for $120

Step-by-step explanation:

64/16= 4 dollars per lens

120/40= 3 dollars per lens

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1

point a is the center of the circle that passes through points e, f, and g and the center of the circle that passes through points x, y, and z.