Which equation is linear? a. x=-2 b. y=3x^2+1 c. y < 5x-2 d. y^2=1/2x+3

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

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

What is the value of x? enter your answer in the box.