I need some help understanding how to solve these problems, could I get some assistance?

9. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Find the equation x2 + 2 + Dx + Ey + F = 0 of the circle that passes through the points. To verify your result, use a graphing utility to plot the points and graph the circle. (0, 0), (0, -2), (3, 0) Need Help? Read It Watch It 10. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A mixture of 6 pounds of fertilizer A, 14 pounds of fertilizer B, and 3 pounds of fertilizer C provides the optimal nutrients for a plant. Commercial brand X contains equal parts of fertilizer B and fertilizer C. Commercial brand Y contains one part of fertilizer A and two part of fertilizer B. Commercial brand Z contains two parts of fertilizer A, five parts of fertilizer B, and two parts of fertilizer C. How much of each fertilizer brand is needed to obtain the desired mixture? (If the system is dependent enter a for brand X and enter brand Y and brand Z in terms of a.) Brand X Brand Y b Brand Z Need Help? Read It Watch It 11. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A health insurance company advertises on television, on radio, and in the local newspaper. The marketing department has an advertising budget of $46,000 per month. A television ad costs $1000, a radio ad costs $200, and a newspaper ad costs $400. The department wants to run 70 ads per month, and have as many television ads as radio and newspaper ads combined. How many of each type of ad can the department run each month? television ads radio ads newspaper ads14. [-J'1 Points] E Solve the system of linear equations and check any solutions algebraically (If there is no solution, enter NO SOLUTION. If the system is dependent, express x, y, and z in terms of the parameter a.) x+y+z=11 2xy+2=13 3x 2=6 (x, v. 2) = ( ) Need Help? W 15. [11 Points] E Solve the system of linear equations and check any solution algebraically. (If there is no solution, enter NO SOLUTION If the system is dependent, set 2 = a and solve forx and yin terms of a.) x+ y+ 2: 7 X72y+4z=11 3y+4z:17 (Li/.2} =( ) 6. [11 Points] DETAILS MY Solve the system of linear equations and check any solutions algebraically. (If there is no solution, enter ND SOLUTION. If the system is dependent, express x, y, and z in terms of the parameter a.) x 3y+ 22: 24 5X13y+122:132 (mi/.2) =( ) Need Help? 7. [11 Points] An object moving vertically is at the given heights at the specified times. Find the position equation 5 : %al2 + Vat + so for the object. At t = 1 second, 5 = 150 feet At t : 2 seconds. 5 : 136 feet At t = 3 seconds, 5 = 80 feet Need Help? SubmitAnswer 8. [-11 Points] Find the equation 5/ = 5x2 + bx + c of the parabola that passes through the points. To verify your result, use a graphing utility to plot the points and graph the parabola. (1. 4), (2. 2), (3. *6} 4. [-I1 Points] DETAILS Perform the row.r operation and write the equivalent system. Add 2 times Equation 1 to Equation 3. x 2}: + 32 = 1 Equation 1 x + 3}: 52 = 5 Equation 2 2x 32 2 Equation 3 E E S