Consecutive angles of a parallelogram are supplementary, so:

This means
and that
.
Since opposite angles of a parallelogram are congruent,

Answer:
Marcelino will break even
Step-by-step explanation:
if he spends 45 dollars on profits, and sells each balloon for $1.50 then you multiply 30 balloons by 1.5 and that equals 45 dollars, so he will break even
The answer would be because you will be adding them anyway when multiplying
Answer:
If the ratio is 1:3 and there are 9 violas, all you have to do is multiply 9 × 3 to get 27.