Question

1. One pipe can fill a tank in 20 minutes, while another takes 30 minutes to fill the same tank. How long would it take the two pipes together to fill the tank? 2. Andy's average driving speed for a 4-hour trip was 45 miles per hour. During the first 3 hours he drove 40 miles per hour. What was his average speed for the last hour of his trip? 3. What is the solution set of the quadratic equation 8x2 +2x +1 =0? 4. If x2 is added to x, the sum is 42. Which of the following could be the value of x? A,-7 В. 6 С. 14 D. 42 5. Which of the following best describes the graph of this system of equations? y2x3 5 y -10x15 A two identical lines B two parallel lines C two lines intersecting in only one point D two lines intersecting in only two points 6. 5x3 10x ? 7. Find the solution to this system of equations? у%3-3x-2 6х +2 у 3-4

Answer 1

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o -2 248.1 2X8 (-32 16 227 16 2A whae xeal Salut Set mayna Solutian Set 1+2 27i Mo - こ。 Cut7)-6N +7/ ; A-620+1120 U2 6,-7 A.-7 B..6

5 X+3 SIOl AS 1 S Henee Two idantcal Linar 274 7. pu thnD in 6n2 (-3-2)- hhk- Henca intnite many Solutm 2-3t-2 Solusin st-36-2), teR