3x+5=23 how would I solves this

Is it greater than or less than7*3_9*2

Organic apples are on special for $1.50 per pound. does total cost vary inversely or directly with the number of pounds purchased? find the cost of 3.4 pounds of apples. a. inversely: $5.10 b. directly; $5.10 c. inversely: $2.27 d. directly; $2.27

What is the gcf of 20c^3-5c^4+30c^6