Why does 30 + (-8) + (-6) equal 16? I'm so confused on this one

An electricians earns $25.00 per outlet he installs. the cost of material is $7.50 per outlet. a new addition needs 12 outlets installed. how much money will he earn?

The temple at the top of the pyramid is approximately 24 meters above ground, and there are 91 steps leading up to the temple. How high above the ground would you be if you were standing on the 50th step?

Which terminating decimal is equivalent to the fraction 58

Over a period of 6 months a colony of rabbits increases in number by 25% and then by a further 30% of there were originally 200 rabbits in the colony how many were there at the end

Explain, why in a real machine the output work is always less than the input work.

A bit is a 0 or a 1. A bit string of length 8 is a sequence of 8 digits, all of which are either 0 and 1. (a) How many bit strings of length 8 are there? (b) How many bit strings of length 8 or less are there?

0 = (x-1) ^2-4 show work <33

Which expression is equivalent to logc^x^2-1/5x?

What is the sum of the angles of an octagon?

7. Find the slope of the line through (-2,6) & (3,14).