Billy is 6 years younger than amy the sum of their ages is 22 the graph below shows two equations where x equals amy and y equals bill how old will each of them be in 8 years it yours you guys are great plz me

22 - 6 = 16

Amy is 16 yrs old

16 - 6 = 10

Billy is 10 yrs old.

16 + 8 = 24

Amy will be 24 years old 8 years later

10 + 8 = 18

Billy will be 18 years 8 years later

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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