True or false: A. All parallelograms are quadrilaterals. Why?

B. All squares are rhombuses. Why?

pls help fast

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.

The value of cos 30° is the same as which of the following?