Eli is making guacamole. he uses 2 tablespoons of cilantro for every 3 avocados. at this rate, how many tablespoons of cilantro will he need for 9 avocados?

6

Step-by-step explanation:

Write and solve an equation of proportions:

 cilantro             avocados

      2                          3

       x                          9

The appropriate equation is thus:

 2         3

=

  x         9

After cross-multiplication, we have 3x = 18, or x =  6.

Need 6 tablespoons of cilantro for 9 avocados.

to find the total number of combinations, multiply the quantity of each item by each other:

2 pairs of shoes x 3 pairs of shorts = 6 different combinations.