01Question 1
Easy
Which of the following describes all values of x for which x/4 + 3 ≤ 9?
Algebra
Solve inequalities, write them from word problems that say at least or at most, and check which points satisfy an inequality or a system of them.
Flip the inequality sign when you multiply or divide by a negative number. And read the words closely: at least means ≥, not >.
Full skill name: Linear inequalities in one or two variables
Pick an answer to check it and see why. Practice sets also have grid-ins, where you type the answer.
Easy
Which of the following describes all values of x for which x/4 + 3 ≤ 9?
Medium
A store sells notebooks for $3 each and pens for $2 each. A customer has $30 to spend and wants to buy at least 4 notebooks. If x is the number of notebooks and y is the number of pens, which system represents these constraints?
Hard
A store buys an item at a wholesale cost of c dollars, where c > 0. The store marks up the wholesale cost by 40% to get the marked price and then sells the item at 15% off the marked price. The store's profit on the item is the selling price minus the wholesale cost. The store wants its profit on the item to be at most $57. Which of the following inequalities describes all possible values of c?
Start a set in this skill. Every answer comes with an explanation.
85 questions in the bank: 19 Easy, 44 Medium, 22 Hard.