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Gemiola [76]
3 years ago
6

a tennis player hits a serve that cannot be returned 45 percent of the time. Out of 300 serves, how many can yiu predict will no

t be returned?
Mathematics
1 answer:
lubasha [3.4K]3 years ago
4 0

Remember that 45%=45/100=0.45

So if the tennis player serves the ball 300 times, and 45% cannot be returned, then we can use the following expression to solve for the answer:

300*0.45=135serves

Answer: 135 serves will not be returned
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Marta_Voda [28]
** 3x - x -7 = 3

2x = 10

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18x - 3 - x = 3

17x = 6

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6 0
3 years ago
<img src="https://tex.z-dn.net/?f=%5Csqrt%7B%28-81%29x%5E%7B2%7D%20%7D" id="TexFormula1" title="\sqrt{(-81)x^{2} }" alt="\sqrt{(
SSSSS [86.1K]

Answer:

We conclude that:

\sqrt{\left(-81\right)x^2}=9ix

Step-by-step explanation:

Given the radical expression

\sqrt{\left(-81\right)x^2}

simplifying the expression

\sqrt{\left(-81\right)x^2}

Remove parentheses:  (-a) = -a

\sqrt{\left(-81\right)x^2}=\sqrt{-81x^2}

Apply radical rule:   \sqrt{-a}=\sqrt{-1}\sqrt{a},\:\quad \mathrm{\:assuming\:}a\ge 0

                 =\sqrt{-1}\sqrt{81x^2}

Apply imaginary number rule:  \sqrt{-1}=i

                 =i\sqrt{81x^2}

Apply radical rule:   \sqrt[n]{ab}=\sqrt[n]{a}\sqrt[n]{b},\:\quad \mathrm{\:assuming\:}a\ge 0,\:b\ge 0

                  =\sqrt{81}i\sqrt{x^2}

                  =9i\sqrt{x^2}

Apply radical rule:  \sqrt[n]{a^n}=a,\:\quad \mathrm{\:assuming\:}a\ge 0

                  =9ix

Therefore, we conclude that:

\sqrt{\left(-81\right)x^2}=9ix

7 0
2 years ago
The corr standard form for 100000+2000+500+150+17+0.08
kari74 [83]
<span>100000 + 2000 + 500 + 150 + 17 +0.08

= 102000 + 500 + 150 + 17 + 0.08

= 102500 + 150 + 17 + 0.08

= 102650 + 17 + 0.08

= 102667 + 0.08

= 102667.08 <--</span>
7 0
3 years ago
Read 2 more answers
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bearhunter [10]

Answer:

The answer is B

Step-by-step explanation:

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3 years ago
3x + y =11 and 6x + 3y = 24 solved by elimination
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Y=2 x=3 double check is at bottom but cut off

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3 years ago
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