For the field trip we bought 30 lunches.
Burgers were $3 and
sandwiches were $2. The
total money spent was
$80. Use elimination to
find the solution.

There are 20 people who had burgers while 10 had sandwiches.

Step-by-step explanation: First you set up the two equations:

x+y=30

3x+2y=80

Then you start the elimination process by making either the x or the y the opposite of one another (I’m using y):

-2x+-2y=-60

3x+2y=80

Eliminate!

x=20

Plug in x to check and solve for y!

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5