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Advocard [28]
3 years ago
13

5+2f;f=6.1 how do you do it im so confused

Mathematics
2 answers:
liberstina [14]3 years ago
7 0
F is the variable. since f is equal to 6.1 you can plug it into the other equation. you multiply 2 and 6.1. this equals 12.2 then you add two. the final answer is 14.2
Alenkasestr [34]3 years ago
5 0
Plug in 6.1. It replaces f. Now multiply 2 times 6.1. That's 12.2. Now add 5. That's 17.2
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Step-by-step explanation:

Given expression is |8-6 i|.

|8-6 i| is a complex expression.

The value of<em> i </em>is –1.

By definition of absolute value, |a+b i|=\sqrt{a^{2}+b^{2}}

Now, substitute |8-6 i| in the above formula.  

\Rightarrow|8-6 i|=\sqrt{8^{2}+(-6)^{2}}  (since <em>i </em>= –1)

                  =\sqrt{64+36}  (since 8^{2}=64 and                    –6^{2}=36)

                  =\sqrt{100}  (Square root of 100 is 10)

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Hence, the value of the expression  |8-6 i| is 10.

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