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BARSIC [14]
3 years ago
7

7x+2^2=25 Please show steps Thanks!

Mathematics
2 answers:
STatiana [176]3 years ago
7 0
<span>
7x+2^2=25
We move all terms to the left:
7x+2^2-(25)=0
determiningTheFunctionDomain 7x-25+2^2=0
We add all the numbers together, and all the variables
7x-21=0
We move all terms containing x to the left, all other terms to the right
7x=21
x=21/7
x=3
</span>
elena55 [62]3 years ago
3 0
7x + 2² = 25
7x + 4 = 25
7x = 21
x = 3
x is equal to three
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laiz [17]
So attached is a picture of the triangle you are talking about and listed under are the choices:

A.) Cos Z=b/c 
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</span>
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Just remember SOH CAH TOA:

Sinθ=  Opposite         Cosθ =    Adjacent             Tanθ=   Opposite
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Adjacent = b
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Hypotenuse = c

SinX= <u> b </u>        CosX =<span><u> a </u></span>            TanX=<span><u> b </u></span>
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So the answer is B. 

Attached is a picture of how I assigned the sides depending on the angle used.

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