David and josh are both practicing for an upcoming swim tournament. every week, david swims for 3x hours at an average speed of x laps per hour. josh swims 5 more hours per week than david, but at an average speed that is 4 laps per hour less than david's average speed. which of the following functions will give the total distance, in laps, that josh swims each week? a) f(x)=3x^2-17x+20 b) f(x)=3x^2+7x-20 c) f(x)=3x^2-7x-20 d) f(x)=3x^2+17x+20

Simone claims the initial value and y-intercept are the same thing on a graph. is she correct? if you know that a line has a slope of and a y-intercept of 7, what is the equation for that line in slope-intercept form?

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %