Luisa is avid horseback riding. this year, she purchased a new safety riding helmet for $125 and continues taking lessons at $20 per lesson. her parents say that she cannot spend more than $800 on riding this year. write an inequality that represents luisas horseback riding expenses for the year.

Adam plans to choose a video game from the section of the store where everything is 75% off. he writes the expression d-0.75d to find the sale price of the game if the original price is d dollars. gena correctly writes another expression, 0.25d, that will also find the sale price of the game if the original price is d dollars. use the drop down menus to explain each part of adams and rena's expression

Find the maximum value of p= 4x + 5y subject to the following constraints :

Aculture started with 2,000 bacteria. after 8 hours, it grew to 2,400 bacteria. predict how many bacteria will be present after 19 hours . round your answer to the nearest whole number. p=ae^kt