Answer:
see below
Step-by-step explanation:
The effect of step 1 shows up in step 2: the variable term is by itself on the left.
The difference between answer choices A and D is somewhat subtle. The goal of the solution process is to isolate the variable. Step 1 is a step on the path to doing that. What it actually does is isolate the variable <em>term</em>, as described by choice D.
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The variable is isolated by dividing by its coefficient in Step 3.
Answer:
The height is 20 meters
Step-by-step explanation:
First set up the equation (Area)80=bh/2 then set up another equation, (height) h=4+2b (base). After this you can substitute h in the equation to end up with 80=(b(2b+4))/2 simplify it to get 80=b^2+2b then solve. The base is 8 meters, plug into the formula that we made before and you find the height is 20 meters.
Answer:
a2−b2=(a−b)(a+b).
Since a≥0 and b>0, a+b>0 and a−b<0 since a<b, thus: (a−b)(a+b)<0. So a2−b2<0. Thus a2<b2.
