6.08 Problem solving with inequalities
Interactive practice questions
Sarah is gathering signatures on a petition to save the Orangutans. If she gets $3$3 times the number of signatures that she has right now, she will have at least enough to get a special mention on the Save the Orangutans website, an amazing $9000$9000 signatures. How many signatures has Sarah collected so far? Let $n$n be the number of signatures she has now.
Oprah charges $\$34.50$$34.50 to style hair, as well as $\$4$$4 per foil. Pauline would like a style and foil, but has no more than $\$58.50$$58.50 to spend.
Sean wants to save up enough money so that he can buy a new sports equipment set, which costs $\$50.00$$50.00. Sean has $\$15.50$$15.50 he saved from his birthday. In order to make more money, he plans to wash neighbors’ windows for $\$2$$2 per window.
The table shows the times of six swimmers in a $1500$1500 meter race. Only those who achieve a time of $24$24 minutes or below qualify for the final.
Use the inequality $t$t$\le$≤$24$24, where $t$t is the time of each swimmer, to find the two swimmers who qualify for the final.