Answer:
(-4,-1)
Step-by-step explanation:
-3x+10y=2
-3x+3y=9
-3x=2-10y
-3x=9-3y
2-10y=9-3y
2-9=10y-3y
7y=-7
y=-1
-3x+3(-1)=9
-3x-3=9
-3x=12
x=-4
-3 + -17 = -(3+17) = -20
Note:
When adding 2 negatives, you add the numbers and put a minus sign in front of your answer, when adding a positive and a negative number, always put the positive number first and then remove the + sign and subtract.
Hope this helped!
The scuba diver is now 47 feet under the surface.