3.mr. smith's class sold wrapping paper for $ 3.50 each and mr. davis ' class sold magazines for $2.75 each. together, the classes sold 72 items and earned $222 for their school a write and solve a system of equations that model the problemshow all your work b which class earned more money ? how much more money did that class earn?

Mr. Smith's class sold 32 items for $112 and Mr. Davis's class sold 40 items for $110

Mr. Smith's class earned $2 more.

Step-by-step explanation:

Let

x = number of items Mr. Smith's class sold

y = number of items Mr. Davis's class sold

1. Together, the classes sold 72 items, then

2. .Mr. Smith's class sold wrapping paper for $3.50 each, so x items cost $3.50x.

Mr. Davis ' class sold magazines for $2.75 each, so y items cost $2.75y.

Together, the classes earned $222, then

3. You get the system of two equations:

From the first equation,

substitute it into the second equation:

Mr. Smith's class sold 32 items for and Mr. Davis's class sold 40 items for

Mr. Smith's class earned more.

maximum area = xy = (16)(32) = 512 ft2

to maximize the area of the garden, the side of the fence parallel to the side of the house should be 32 ft long, and the other two sides should both have length 16 ft.'

source

300pi

step-by-step explanation: