Answer:

Step-by-step explanation:
We want to simplify:

This is the same as:

Now let us convert the mixed numbers to improper fractions.

We multiply by the reciprocal of the second fraction to get:

Cancel out the common factors to obtain:

Answer:
3x-4y-9
Step-by-step explanation:
Combine like terms
Answer:
3/4
Step-by-step explanation:
28 total but 12 are boys so girls = 28 - 12 = 16
Ratio of boys to girls
= 12/16
= 3/4
#18 answer is 52
#19 answer is 152,100
and I cant make out the rest can you please write them in the comments of this answer?