Carla adds together the multiples of 3, in order and tell her friends to guess which number was the last one she added if her total is 84

28

Step-by-step explanation:

I know that 20 times 3 equals 60 and that 24 plus 60 equals 84 so we need to find out what times 3 equals 24 I know that 8 times 3 equals 24 so we add 20 and 8 to get our answer 28

4

Step-by-step explanation:

Given that:

Number of beads used to make 4 bracelets = 16

Number of bracelets made =

Number of beads used =

To find:

The constant of proportionality = ?

Solution:

Number of bracelets made is proportional to Number of beads.

i.e.

OR

Where is the constant of proportionality.

We are given that:

when

Putting the values in the above equation:

Therefore, the constant of proportionality is 4.