How do you prove adjacent sides are perpendicular?

What is the following product? 3/24 345 69 6 (V5) 6 ({/10

That he had $40 in her pocket she bought 12 identical bags of popcorn that he was left with $10 after buying the popcorn what was the price in dollars each bag of popcorn

1. 2 (x-3) = 9 + 3 (x-9)

What expression represents the profit, and what is the profit if 240 cell phones are sold? 40x - 30; $2,400 40x - 30; $9,570 70x + 50; $16, 850 70x + 50; $28,800

Pizza parlor A advertises 20 different three-topping pizzas. How many individual toppings does Pizzeria A actually use?

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.