For her birthday, Melissa gets a $100 gift card to a local
bookstore. Each week, Melissa
treats herself to a $5 book.
Write a function for the
situation.
After how many weeks, will
Melissa have $20 left in the
gift card?
pls answer asap

Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. the douglas-fir is a conifer tree that grows in the taiga biome. it has an average height of about 70 feet, and its wood is an important source of lumber.

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

Which math sentence can be used to determine if the triangle is a right triangle?