If d, e, and f are midpoints of the sides of ABC, find the perimeter of ABC 105

28

70

35

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years

The graph of f(x) = |x| is transformed to g(x) = |x + 11| - 7. on which interval is the function decreasing?