The temperature in nico’s town was -2.8 at noon. the temperature increased at a steady rate of 1.3 per hour until 6: 00 p. m. then, the temperature decreased by a total of 3.7 by midnight. what was the temperature at midnight?

The temperature at midnight is 1.3 degrees

1.3 as -2.8 x 1.3(6) =5 then 5-3.7 is 1.3

If you want more explanation I'm more than happy to and I hope this helps:) 

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.