Answer:
4n+13
Step-by-step explanation:
combine like terms.
To eliminate z multiply equation A by 7 and subtract both equations or divide equation B by 7 and subtract. (in this case, multiplying Equation A by 7 would be easier)
Answer:
the answer is either C or D
check the picture below.
the line QS is just a flat-line and therefore it has 180° on either side, so the angle QPR is 57°, as you see there, and since we know the diameter is 20, that simply means the radius of the circle is 10.

Answer:
1. B
2.c
3. E
4.d
5.A
Step-by-step explanation: