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DedPeter [7]
3 years ago
8

27. Explain the Error Yuan is asked to evaluate the expression (-8)' on his exam, and writes that it is unsolvable because you c

annot evaluate a negative number to an even fractional power. Is he correct, and if so, why? If he is not correct, what is the correct answer?
Mathematics
1 answer:
DanielleElmas [232]3 years ago
3 0

Answer:

he is incorrect the answer is -4

Step by step explanation:

\sqrt[3]{-8^{2} }  \\\\\\\sqrt{-2^{2} } \\\\= -4

just because something is negative doesn't mean it cant still be divided

it will still be able to be divided but it will be a negative number

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Please please help me
Gekata [30.6K]

Answer:

\large\boxed{\dfrac{\boxed{8}}{81}}

Step-by-step explanation:

\text{If}\ a_1,\ a_2,\ a_3,\ a_4,\ ...,\ a_n\ \text{is the geometric sequence, then}\\\\\dfrac{a_2}{a_1}=\dfrac{a_3}{a_2}=\dfrac{a_4}{a_3}=...=\dfrac{a_n}{a_{n-1}}=constant=r-\text{common ration}.\\\\\text{We have}\ \dfrac{1}{2},\ \dfrac{1}{3},\ \dfrac{2}{9},\ \dfrac{4}{27},\ ...\\\\\dfrac{\frac{1}{3}}{\frac{1}{2}}=\dfrac{1}{3}\cdot\dfrac{2}{1}=\dfrac{2}{3}\\\\\dfrac{\frac{2}{9}}{\frac{1}{3}}=\dfrac{2}{9}\cdot\dfrac{3}{1}=\dfrac{2}{3}\\\\\dfrac{\frac{4}{27}}{\frac{2}{9}}=\dfrac{4}{27}\cdot\dfrac{9}{2}=\dfrac{2}{3}

\bold{CORRECT}\\\\\dfrac{x}{\frac{4}{27}}=\dfrac{2}{3}\qquad\text{multiply both sides by}\ \dfrac{4}{27}\\\\x=\dfrac{2}{3}\cdot\dfrac{4}{27}\\\\x=\dfrac{8}{81}

8 0
3 years ago
Plz help I suck at math and need help on this.... divided by 18
MatroZZZ [7]
2 divided by 18 is 9 and 3 divided by 18 is 6 hope that helps
6 0
3 years ago
NEED ANSWER QUICK, fastest correct answer will be marked brainiest !!!!
makkiz [27]
I’m pretty sure he could only make 1 rectangle with 5cm because it’s an odd number which means he couldn’t stack them on top of each other evenly like he could with the 6cm rectangles, so he’d only be able to line them up next to each other and that’s it (I hope that’s right; sorry if it’s not but it makes sense to me lol)
8 0
3 years ago
Answer me and get brainliest<br><br><br><br>pls find the volume
aalyn [17]

Answer:

6720 ft³

Step-by-step explanation:

Volume = \frac{1}{2} * base * height * length

Here the base is 14 ft, height is 24 ft and length is 40 ft

using the formula:

\frac{1}{2} * 14* 24* 40

6720 ft³

6 0
2 years ago
Read 2 more answers
Find x<br>1. x + 10 &lt; -7<br>2. -3x - 4 &gt; 5<br>Help me please
oksian1 [2.3K]

1)

x+10<-7

bring 10 to the other side

x<-10-7

x<-17

2)

-3x-4>5

bring -4 to the other side

-3x>9

divide -3 at the other side, since it is negative it changes to less than

x<-3

8 0
2 years ago
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