What is the simplified value of the expression below?
-2.6+5.8

-8.4

-3.2

3.2

8.4

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters