N + d = 30
0.05n + 0.10d = 2.20
^^ ur system of equations
I disagree with the student because the slope is the rate of change. The slope would be 10 because the rocks are increasing by 10 every month.
There are no real numbers that can do that job.
There's a pair of complex numbers that can do it.
They are
4.5 + i23.23
and
4.5 - i23.23 .
' i ' = the imaginary unit = √(-1)
Complement angles, sum is equal 90
Give one angle = 70 to find other: 90 - 70 = 20
Answer
Complement of angle with the measure of 70 degrees is 20 degrees
