Mr. Walter is losing 20% of his hair each year. If he currently has 1,546 hairs on his head, about how many hairs will he have left after (x) years. Write the function that represents this situation

Janets dinner costs 7.50. if she wants to leave a 10% tip how mich extra should she leave

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?