Find a ⋅ b.

a = 7i - 4j, b = 4i + 3j

A)

B) 16

C) - 40

D)

Which of the following is always true of the vertical angles formed by perpendicular lines? Check all that apply. A. They are congruent. B. They are right angles. C. They are acute. D. They are obtuse.

Of the 48 oranges in a carton, one-third of them were rotten. Ben and David took the remaining good oranges. If Ben took 8 more oranges than David, how many oranges did David take?

The number of bacteria in a Petri dish increases by 19% every hour. If there were initially 300 bacteria placed in the Petri dish, write a function that can be used to determine the number of bacteria in the Petri dish in exactly hours.

Write a real-world situation that cloud be modeled by the equation 120+25x=45x

Olivia baked 23 mini loaves of banana bread to be sliced for snacks at a craft fair. what if olivia wants to put only whole lives at each location? how many loaves will be at each location?

Lee's family had a garden in the shape of a right triangle. The total area of the garden is 16 square feet.

A can of soup has a volume 12 fluid ounces about how many milliters is this? A) 12 mL B) 120mL C) 29.6mL D) 355mL

A shoe store is offering a 25% discount on all pairs of shoes in the store. Every store employee gets an addtional 15% off the already discounted price. How much will an employee have to pay for a pair of shoes that has an original price of $80? A.

A rectangular solid has sides of 4cm, 6cm, and 8cm. What is it's surface area?

Why do some screws have flat tips?