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zavuch27 [327]
2 years ago
5

8. In the figure shown below, AABC and ADEC are right triangles. The

Mathematics
2 answers:
MrRissso [65]2 years ago
5 0

Answer:

27ft^{2}

Step-by-step explanation:

\frac{20}{6} = \frac{21 + x}{x}  Cross multiple and solve for x

20x = 6(21 + x)  Distribute the 6

20x = 126 + 6x  Subtract 6x from both sides

14x = 126  Divide both sides by 14

x = 9  

Now that we know EC is 9 we can calculator the area of the triangle

a = \frac{lw}{2}

a = \frac{(9)(6)}{2}

a = \frac{54}{2}

a = 27

serious [3.7K]2 years ago
5 0
It is 27ft
i’m not sure but here ya go
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How do you Simplify -38=7+9x
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4 years ago
1 - For what value of n is 20 = n/5 + 10 ?
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First one

20=n/5+10
minus 10 both sides
10=n/5
times 5 both sides
50=n


2.
hmm
expand
p(x)=2x^2+5x+3-3x-3n
p(x)=2x^2+2x+3-3n
it looks like the coefients of the x terms are divisble by 2
because
if we have
p(x)=2(something)
the p(x) is divisible by 2

therefor that factor is 2 or -2
find what value of n works
so
3-3n=a multipule of 2
we are given
-3,-2,0,2
try each
3-3(-3)=3+9=12, that's divisble by 2
3-3(-2)=3+6=9, that's not divisible by 2
3-3(0)=3, that's not divisble by 2
3-3(2)=3-6=3, that's not divisble by 2


the onnly one that woks is when n=-3

answer is A
 
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3 years ago
I’m not sure if my answer correct. If you can please help me.
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Answer:

i think it correct

Step-by-step explanation:

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