How can $42,000 be invested, part of 4% annual simple interest and the remainder at 10% annual simple interest, so that the interest earned by the two accounts is equal at the end of the year?

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?

An equation where variables are used to represent known values—function notation true or false

What is always true about a positive integer raised to a negative odd power?