How many ways can you split 5 things into 3 groups?

Let r = 3. what is the value of r + 58?

Asalesperson earns $320 per week plus 8% of her weekly sales. the expression representing her earnings is 320 + 0.08x. which of the following describes the sales necessary for the salesperson to earn at least $1000 in the one week?

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?