Can someone work out the odd numbers for me?

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

State whether weight is a function of height for the six students and explain. a. yes, height is a function of weight because two students weigh 165 pounds but have different heights. b. no, height is not a function of weight because two students weigh 165 pounds but have different heights. c. yes, weight is a function of height because for each value of height there is one corresponding value of weight. d. no, weight is not a function of height because there is not enough data to determine a function.

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29