1800 m of fencing is available to fence six identical pens as shown.
a. explain why 9x+8y=1800
b. show the total area of each pen is given by a=-(9/8)x^2+225x
c. if the area enclosed is to be maximised, what is the shape of each pen?

Which function has the smallest y-intercept value

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.