305 × 4 = 1220
215 × 2 = 430
1220 - 430 = 790
The change in the altitude of the balloon is 790 feet.
What is the problem,..........
On the 21st day; the 7th day of the back medication and the 3rd day of the asthma medication.
Answer:
42 adults and 196 children went to the zoo
Step-by-step explanation:
Let
x ----> the number of adults
y ----> the number of children
we know that
The total bill for the 238 people from a school trip was $1330
so
----> equation A
----> equation B
Solve the system of equations by graphing
Remember that the solution is the intersection point both graphs
using a graphing tool
the solution is the point (42,196)
see the attached figure
therefore
42 adults and 196 children went to the zoo
For graphs, always start with line <em>x</em> then do line <em>y</em>.