0.25-1.125-16/8=??
Answer is -2.875
I would do 12 x 10 = 120
to compensate do 120 - 12 =108 same as 12*9 = 108
The estimate is decent, because we are only $12.00 from the real answer.
Answer:

Step-by-step explanation:
In 2002, a robot explored a tunnel 210 feet long inside the
Great Pyramid in Egypt. The robot could travel about 10 feet per
minute.
The speed of the robot is 10 feet per minute
we need to find the equation for giving distance y
the robot travel in x minutes
to time is x minutes
Distance = speed x time
speed=10, distance is y and time is x

Answer:
1st, keep value of x in 1st equation
Step-by-step explanation:
-6(-2y-1)+2y=48
12y+6+2y=48
14y=48-6
y=42/14
y=3
Now putting value of y in equation ii)
x= - 2y-1
x= - 2×3-1
x= - 6-1
x= - 7
Therefore, x= - 7
y=3