Answer:
Step-by-step explanation:
Given
Represent each friend with the first letter of their name
So:
Substitute: in
Collect like terms
Make D + E the subject in
Substitute in
Collect like terms
Substitute in and
So, we have:
We have:
i.e.
and
For and to be true,
i.e.
So, we have:
6.6c - 3.6c - 2.3c = 0.7c
3.3m² + 4.9m² = 8.2²
=0.7c + 8.2²
The answer -35.5 Hope this helps you