22. Compute the following algebraic sums:
a) 5 - 3 + 6 + 2 - 10 - 12:
b) -15 + 8 + 9 - 3 - 5 + 18;
c) 28 - 41 +62 + 3 - 102 - 5:
d) -1.2 + 5.8 - 6.7 - 5.9 + 2.4;
e) 7.4 - 5.8 + 8.3 -6.1 + 7.5:
f) 12.6 - 15.4 + 7-10;
g) 7.8 - 3.5 + 5.3 - 12.1 + 7.8;
h) 10.6 - 13.4 + 4 - 10:
i) 7 - 5 - 9 + 0.3 -0.08 ;
j) -24 + 11.02 - 3.014 + 0.05 -0.007.​

Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day