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ASHA 777 [7]
2 years ago
9

How to find the width of a rectangle if it's missing A=21 L=7 W= ?

Mathematics
1 answer:
Radda [10]2 years ago
3 0

Answer:

The width is 3

Step-by-step explanation:

the formula is l×w

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Write an exponential growth function to model the situation. A population of 422000 increases by 12% each year
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<span> Write an exponential growth function to model the situation. A population of 
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3 0
3 years ago
Solve the equation x2 – 12x =9
lord [1]

x = 3 \sqrt{5}  + 6 = 12.708203

3 0
3 years ago
A veterinarian collects data on the number of times race horses are raced during their careers. The veterinarian finds that the
SpyIntel [72]

Answer:

c. (12.12, 18.48)

Step-by-step explanation:

Hello!

The study variable is X: number of times a racehorse is raced during its career.

The average number is X[bar]= 15.3 and the standard deviation is S= 6.8 obtained from a sample of n=20 horses.

To estimate the population mean you need that the variable has a normal distribution, in this case, we have no information about its distribution so I'll assume that it has a normal distribution. With n=20 the most accurate statistic to use for the estimation is a Students-t for one sample, the formula for the interval is:

X[bar] ± t_{n-1;1-\alpha /2} * \frac{S}{\sqrt{20} }

t_{n-1;1-\alpha /2} = t_{19;0.975}= 2.093

[15.3 ± 2.093 * \frac{6.8}{\sqrt{20} }]

[12.12; 18.48]

Using a significance level of 95% you'd expect that the true average of times racehorses are raced during their career is included in the interval [12.12; 18.48].

I hope it helps!

8 0
3 years ago
How many ways can 6 letters be arranged 3 at a time
ivolga24 [154]

Answer in attachment

Mark brainliest pls :)

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2 years ago
Substitution method y= 3x-2 and 2x-3y=16<br><br>solution (__), (__)<br><br>thanks
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Answer:

i got (-10/7, -44/7)

8 0
3 years ago
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