Answer:
Use the vertical line testing, which means that if the line touches one point then it is a function. If it touches more than 1 point, then it is not a function. Also, if one x value leads to one y-value then it is a function. If different x-values lead to one y-value it is also a function.
Step-by-step explanation:
Write down the ratio using one type of term (number of workers or time). Write down the ratio with the second type of term (number of workers or time). Invert one of the ratios (flip it upside down). Cross-multiply, divide and solve (the same method used for direct proportions).
Answer:
5 years old
Step-by-step explanation:
let 'f' = age of friend
let 'f+2' = age of friend in 2 years
let 'f-8' = age of dog now
f + 2 = 3(f - 8)
f + 2 = 3f - 24
-2f = -26
f = 13
currently, friend is 13 and dog is 5
Answer:
155
/84 or 1 and 71 eighty-fourths
Step-by-step explanation:
