Estimate the solution to the system of equations. You can use the interactive graph below to find the solution. { y = − 2 x − 5 y = 2 x − 2 ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ y=−2x−5 y=2x−2

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6