What is the value of x ? A. 2 units B. 3 units C. 5 units D. 8 units

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?

Can someone me do math because i am having a breakdown rn because i don’t get it

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me