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rusak2 [61]
3 years ago
15

Please help with these

Mathematics
1 answer:
oee [108]3 years ago
3 0

Answer:

A) √29 = x   B)  x = √41.8   C) √109 = x    D) x = √489.24

Step-by-step explanation:

A) 2² + 5² = x²

    4 + 25 = x²

          29 = x²

        √29 = x

B) 3.6² + x² = 7.4²

 12.96 + x² = 54.76

-12.96          - 12.96

              x² = 41.8

              x = √41.8

C) 3² + 10² = x²

    9 + 100 = x²

           109 = x²

          √109 = x

D) 7² + x² = 23.2²

    49 + x² = 538.24

    -49           -49  

            x² = 489.24

            x = √489.24

If these answers are correct, please make me Brainliest!

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50x29=1/2 of _ x29 plz help this is so hard
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I hope you understand.
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The half-life of a radioactive kind of tellurium is 40 minutes. How much will be left after 360 minutes if we
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How is the pattern changing to get from one term to the next? 55, 49, 43, 37, 31,...
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C.

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6 0
3 years ago
If y-3x=9, 7x+y=25, what is the value of x and y?
lianna [129]

\bold{\rm{Given}}\text{ : If y - 3x = 9, 7x + y = 25, what is the value of x and y}?

\bold{\rm{Solution}} \text{: We'll solve this by substitution method}

\dashrightarrow  y - 3x = 9 \\  \\  \dashrightarrow   \boxed{y = 9 + 3x } \qquad .. \sf eq(1)

\text{we got the value of y now getting the value of x}

\looparrowright 7x + y = 25 \\  \\  \looparrowright 7x = 25 - y \\  \\  \looparrowright  \boxed{x =   \frac{25 - y}{7}} \qquad .. \sf eq(2)

\text{Now, putting y = 9 + 3x in eq(2)}

\hookrightarrow  x =  \frac{25 - y}{7}   \\  \\ \hookrightarrow  x =  \frac{25 - 9 + 3x}{7}  \\  \\ \hookrightarrow  7x =  25 - 9 + 3x \\  \\ \hookrightarrow  7x - 3x =  16 \\  \\ \hookrightarrow  4x = 16 \\  \\ \hookrightarrow  x =  \frac{16}{4}  \\  \\ \star \quad  \boxed{ \green{ \frak{ x = 4}}}

\text{Now we know the value of x, for getting y we need to put x in eq(1)}

: \implies y = 9 + 3x \\  \\   : \implies y = 9 + 3(4) \\  \\  : \implies y = 9 + 12  \\  \\    \star \quad  \boxed{\frak{  \green{y = 21}}}

\text{Hence, values of x and y are} \:  \frak{ \green{4}}  \: \text{and} \:  \frak{ \green{21}} \: \text{respectively}.

4 0
2 years ago
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