Which system of equations below has exactly one solution? O y=-8x - 6 and y = -8x + 6

y=-8x - 6 and 7y = -4x - 3
O y=-8x – 6 and y = 8x - 6
O y=-8x – 6 and -y = 8x + 6

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c

(60 points) explain this in detail

Which number is located at point a on the number line? a number line is shown from negative 10 to 10 with each interval mark on the number line representing one unit. point a is labeled one interval mark to the right of negative 5.