Add the polynomials and explain how you arrived at your answer. (9p3 + 5r2 + 11r) + (-2m3 + 9r – 8r²)
(pls help)

How many natural numbers n satisfy the inequality: 1/7 < n/10 < 4/5 ?

Question: what is the value of x 4x-2= (-7) +5x. it would be greatly appreciated if someone could actually explain to me step by step

Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?