Which expressions are equivalent to the one below? check all that apply 21x/7x

Which of the following is the correct ratio for converting kilograms to grams

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9