Answer:
see the explanation
Step-by-step explanation:
Let
x -----> the number
we know that
Three-eighths multiplied by a number plus one must be equal to 11
so
The linear equation that represent this situation is
Solve for x
Subtract 1 both sides
Multiply by 8/3 both sides
The number is 80/3
The answer is 128.5°
You multiply 180/pi by 257pi/360 and that gives you 128.5.
18 would be 6 so thats the answer