Set up the data:
3,3,3,3,3,6.5,6.5
15+13=28
28/7=4
He runs an average of 4 miles a day
Answer:0.333
Step-by-step explanation:
notice the first term is -10, and the common difference is 3, so we add 3 to get the next term.
check the picture below.
Answer:
let the daughter age be x
let mother age be 3x
Step-by-step explanation:
x+3x= 80
4x = 80
x= 80\4
x=20
daughter age is 20
mather age= 80 -20
= 60
daughter age 20
mother age 60