Answer:
n = -1
Step-by-step explanation:
you've accidently substracted 6n from 12n when you were supposed to be adding them. (-6n becomes +6n when brought to the otherside of the equal sign)
Answer:
= 4.44948
or = 
<em>step by step...solving </em>
<em>10 + 4</em>
<em />
<em>add/subtract </em>
<em>² = 6</em>
<em>=10 + 4</em>
<em> + </em>
<em>² - 6</em>
<em>Refine</em>
<em>= </em>
<em> ² + 4</em>
<em> + 4</em>
<em>rewrite </em><em>↑</em><em> as </em>
<em>² + 2</em>
<em> * 2 + 2²</em>
<em>apply Perfect Square Formula (a + b)² = a² + 2ab +²</em>
<em>a = </em>
<em>, b=2</em>
<em>= (</em>
<em> + 2)²</em>
<em>= </em>
<em>2square </em>
<em>(the 2 square would not fit like i wanted it to)</em>
<em>apply radical rule </em>
<em>, assuming a ≥ 0</em>
<em>= </em>
<em />
posting others as picture (have an account with Symbolab to help me as well. Just taking too long to type in the step by step if you need it. all pictures have the decimal result.
We have two triangles with base 9ft and height 12.3ft and two triangles with base 11ft and height 11.9ft.
The formula of an area of a triangle:

Triangle #1:
b = 9ft and h = 12.3ft. Substitute:

Triangle #2:
b = 11ft and h = 11.9ft. Substitute:

The Lateral Area:

<h3>Answer: B. 241.6 ft².</h3>
Hmm a number as. a decimal is 1/2=0.50