1. A and E are Equivalent: In E the subtraction symbol cancels out the negative symbol.
B and F are Equivalent: -5 -11 is the same as saying -5+(-11)
C and G are Equivalent: In C two negatives equal a positive so it really is just -5+11
2. I learned that there’s a lot of combinations for just 2 numbers and I learned how transport photos onto my laptop and make this post.
Cupric Sulfate
Generic Name: Cupric Sulfate; powder, for solution
Cupric Sulfate Pentahydrate Label
Description: A blue crystalline solid used in electroplating and as a fungicide.
Cost: Around $20 – $30
Ingredients: Cupric Sulfate
Purposes: Copper sulfate pentahydrate is a fungicide. However, some fungi are capable of adapting to elevated levels of copper ions. Its compound with lime, called Bordeaux mixture, is used to control fungus on grapes, melons, and other berries.
Another application is Chechen compound, a mixture of copper sulfate and ammonium carbonate used in horticulture to prevent damping off in seedlings.
Medical Purposes: Copper sulfate was used in the past as an emetic. It is now considered too toxic for this use. It is still listed as an antidote in the World Health Organization’s Anatomical Therapeutic Chemical Classification System.
Warning
Keep out of reach of children.
Sources: https://www.drugs.com/pro/cupric-sulfate.html
https://en.wikipedia.org/wiki/Copper(II)_sulfate