Find all solutions of the given system of equations and check your answer graphically. (If there is no solution, enter NO SOLUTION. If the system is dependent, express your answer in terms of x, where y = y(x).) x + y = 40 x - y = 20 (x, y ) = Need Help? Read It Submit Answer 2. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOT Find all solutions of the given system of equations and check your answer graphically. HINT [ First eliminate all fractions and decimals.] (If there is no solution, enter NO SOLUTION. If the system is dependent, express your answer in terms of x, where y = y(x).) 0.4x + 0.1y = 0.8 0.2x - 0.2y = 0.8 (x, y ) = Need Help? Read It Watch It 3. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOT Find all solutions of the given system of equations and check your answer graphically. HINT [First eliminate all fractions and decimals.] (If there is no solution, enter NO SOLUTION. If the system is dependent, express your answer in terms of x, where y = y(x).) 1 M X N/ x -4 (x, y) =4. L ASK YO ACHER Find all solutions of the given system of equations and check your answer graphically. (If there is no solution, enter NO SOLUTION. If the system is dependent, express your answer in terms of x, where y = y( 5x + 7y = -X - ( x, y ) = Need Help? Read It Watch It 5. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER Find all solutions of the given system of equations and check your answer graphically. (If there is no solution, enter NO SOLUTION. If the system is dependent, express your answer in terms of x, where y = y 2x - 3y = 3 4x - 6y = ( x, y ) = Need Help? Read It Watch It 6. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER Use technology to obtain approximate solutions graphically. All solutions should be accurate to one decimal place. (Zoom in for improved accuracy.) 3x - y = 5 x + 3y = :5 ( x , y ) =7. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Use technology to obtain approximate solutions graphically. All solutions should be accurate to one decimal place. (Zoom in for improved accuracy.) 0.2x + 4.7y = 1 1.6x + 1.3y = 2 ( x , y ) = Need Help? Read It 8. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Translate the given statement into a linear equation in the form ax + by = c using the indicated variable names. Do not try to solve the resulting equation. HINT [See Example 7 and the end of section FAQ.] There are eight times as many soccer fans (*) as football fans (y). Need Help? Read It Watch It 9. [-/2 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You manage an ice cream factory that makes two flavors: Creamy Vanilla and Continental Mocha. Into each quart of Creamy Vanilla go 2 eggs and 3 cups of cream. Into each quart of Continental Mocha go 1 egg and 3 cups of cream. You have in stock 550 eggs and 1,200 cups of cream. How many quarts of each flavor should you make in order to use up all the eggs and cream? Creamy Vanilla qt Continental Mocha Need Help? Read It Watch It10. [-/3 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER One serving of Campbell Soup Company's Campbell's" Pork & Beans contains 5 grams of protein and 21 grams of carbohydrates. A typical slice of white bread provides 2 grams of protein and 11 grams of carbohydrates per slice. The U.S. RDA (Recommended Daily Allowance) is 60 grams of protein each day. (a) I am planning a meal of "beans on toast" and wish to have it supply one-half of the RDA for protein and 139 grams of carbohydrates. How should I prepare my meal? (Fractions of servings are permitted.) beans serving (s) bread slice(=) (b) Is it possible to have my meal supply the same amount of protein as in part (a) but only 87 grams of carbohydrates? O Yes O No Need Help? Read It Watch It 11. [-/2 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Purchasing Earl is ordering supplies. Yellow paper costs $4.00 per ream while white paper costs $7.50 per ream. He would like to order 100 reams total, and has a budget of $533. How many reams of each color should he order? yellow paper reams white paper reams Need Help? Read It 12. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The demand and supply functions for your college newspaper are, q = -9,000p + 6,800 and q = 6,000p + 800, respectively, where p is the price in dollars. At what price should the newspapers be sold so that there is neither a surplus nor a shortage of papers? $