What is the perimeter of triangle DEF?

A 10.4 units
B 2.4 units
C 4.2 units
D. 12.2 units
HELP PlZ

Estimate the distance between orlando and jacksonville

Answer soon(fast) 15 pts-brainliest? for right answer with small explination a restaurant catered a party for 40 people. a child’s dinner (c) cost $11 and an adult’s dinner (a) cost $20. the total cost of the dinner was $728. how many children and adults were at the party? use the table to guess and check.(i couldn't get the graph onto the question)                                8 children and 32 adults9 children and 31 adults10 children and 30 adults12 children and 28 adults

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.