3 years ago

Z

Mathematics

1 answer:

dedylja [7]3 years ago

7 0

Answer:(-5,2)

Step-by-step explanation:

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What is the answer for <br>9=81×

galina1969 [7]

The awnsser is 9..................

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2 years ago

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Five thousand three hundred seventy expanded form

Andreyy89

In expanded form it’s:5,000+300+70

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2 years ago

Each year, all final year students take a mathematics exam. It is hypothesized that the population mean score for this test is 8

drek231 [11]

Answer:

95% Confidence interval: (96.06,103.94)

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 85

Sample mean, $\bar{x}$ = 100

Sample size, n = 30

Alpha, α = 0.05

Population standard deviation, σ = 11

95% Confidence interval:

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

$100 \pm 1.96(\frac{11}{\sqrt{30}} ) = 100 \pm 3.94= (96.06,103.94)$

(96.06,103.94) is the 95% confidence interval for the population mean test score.

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2 years ago

1/3x² + x+5/3x² = 1/9<br><br>HAHAHAHA......

mr_godi [17]

Answer:

Now, 3x 2+x+5⩾0

This is because b² −4ac=1−4×5×3

=−59 (roots are imaginary)

3x²+x+5=(x−3)² =x²+9−6x and x−3⩾0

2x²+7x−4=0

2x²+8x−x−4=0

2x(x+4)−1(x+4)=0

(2x−1)(x+4)=0

x= 1/2 and−4 but x≥3

∴ No solution.

lol hehehe

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2 years ago

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If 24 pieces of velcro costs 1.95 how much would 1000 pieces cost

BartSMP [9]

Hi!

Each piece cost 1.95, then 1000 pieces will cost:

1000 * 1.95 = 1950

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2 years ago