Answer:
the ans is 16 square cm ok
535 + 8
The elevation difference is a total of 543 feet between Driskill Mountain and New Orleans.
So r+c=42
c=4+r
subsitute c=4+r for r in r+c=42
r+4+r=42
add like terms
2r+4=42
subtract 4 from both sides
2r=38
divide both sides by 2
r=19
rob=19
subsitute r=19 for r in c=4+r
c=19+4
carly=23
P/9 = 90
Multiply 9 to 90 to isolate the variable.
P = 9 x 90
P = 810
