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alexira [117]
3 years ago
9

Need help with these two math questions

Mathematics
1 answer:
MaRussiya [10]3 years ago
8 0

√3 x √5 = √15

7√15 - 2√15 = answer 5√15


simple

6² = 36

7² = 49

8² = 64

√64

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How do i evaluate it????
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Answer:

1 for all evaluate questions

Step-by-step explanation:

just remember anything to the zero power is 1

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3 years ago
Rewrite each expression without a negative exponent none of the above<br>x^-1​
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Answer:

x^-1

x^1

Step-by-step explanation:

Oooops ...can you please repeat ur Question

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3 years ago
Read 2 more answers
A trucking firm has a large inventory of spare parts that have been in storage for a long time. It knowsthat some proportion of
Debora [2.8K]

Answer:

0.1546\leq \widehat{p}\leq 0.3513

Step-by-step explanation:

The firm tests 75 parts, and finds that 0.25 of them are notusable

n = 75

x = 0.25 \times 75 = 18.75≈19

\widehat{p}=\frac{x}{n}

\widehat{p}=\frac{19}{75}

\widehat{p}=0.253

Confidence level = 95%

So, Z_\alpha at 95% = 1.96

Formula of confidence interval of one sample proportion:

=\widehat{p}-Z_\alpha \sqrt{\frac{\widehat{p}(1-\widehat{p}}{n}}\leq \widehat{p}\leq \widehat{p}+Z_\alpha \sqrt{\frac{\widehat{p}(1-\widehat{p}}{n}}

=0.253-(1.96)\sqrt{\frac{0.253(1-0.253)}{75}}\leq \widehat{p}\leq0.253+(1.96)\sqrt{\frac{0.253(1-0.253}{75}}

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7 0
3 years ago
Please help me, i promise its worth it!!!
Rashid [163]

\\ \sf\longmapsto 2(L+B)=55

\\ \sf\longmapsto 2(\dfrac{4}{3}x+x)=55

\\ \sf\longmapsto \dfrac{8}{3}x+2x=55

\\ \sf\longmapsto \dfrac{8x+6x}{3}=55

\\ \sf\longmapsto \dfrac{14x}{3}=55

\\ \sf\longmapsto 14x=165

\\ \sf\longmapsto x=11.78

\\ \sf\longmapsto x\approx 12

Now

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5 0
2 years ago
Read 2 more answers
A car is towed using a force of 1600N. The rope used to pull the car makes an angle of 25∘ with the horizontal. Find the work do
mezya [45]

Answer: 2900185 Joules

Step-by-step explanation:

Force used to tow the car is 1600N

Angle(α)= 25

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Recall that 1km= 1000m

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W= 1600 * 2000 * cos 25

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Since 1J = 1Nm

Work done = 2900185 J

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3 years ago
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