Adiet is to include at least 140 milligrams of vitamin a and at least 145 milligrams of vitamin b. these requirements can be obtained from two types of food. type x contains 10 milligrams of vitamin a and 20 milligrams of vitamin b per pound. type y contains 30 milligrams of vitamin a and 15 milligrams of vitamin b per pound. if type x food costs $12 per pound and type y food costs $8 per pound how many pounds of each type of food should be purchased to satisfy the requirements at the minimum cost? round to the nearest hundredths.

(50 ) mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.

The dance committee of pine bluff middle school earns $72 from a bake sale and will earn $4 for each ticket they sell to the spring fling dance. the dance will cost $400 write an inequality to determine the number, t of tickets the committee could sell to have money left over after they pay for this year's dance. what is the solution set of the inequality?

Which is the graph of the following inequality?