2/9 of the students in the school are in 6th grade. a. How many 6th graders are there if the school has 90 students?

b. How many 6th graders are there if the school has 27 students?

c. How many 6th graders are there if the school has x students? Write an

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

Write the equation in general quadratic form: plz !