Marcus is 20 years older than his youngest sister cindy of some of their years is 66 how old is cindy marcus is 20 years older than his youngest sister cindy the sum of their years is 66 how old is sandy

23

Step-by-step explanation:

If cindy is 23 and marcus is 20 years older, 23+20= 43. Cindy is 23 and Marcus is 43, their ages added together is 66.

99

step-by-step explanation:

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