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3 years ago

Please help!

Mathematics

2 answers:

myrzilka [38]3 years ago

5 0

Answer:

Step-by-step explanation:

The ratio is 3:6 or 3/6

You can create equivalent fractions by multiplying the numerator and denominator by the same number.

Boys Girls

3 6 This is given in the problem.

· 4 · 4 As explained above

12 24

Inessa05 [86]3 years ago

3 0

24 girls divided by 6 girls = 4 boys. 3 boys for every girl and there is 6 girls so you would do 4 x 3 = 12 boys.

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In a sample of 700 gas stations, the mean price for regular gasoline at the pump was $2.894 per gallon and the standard deviati

frez [133]

Answer:

$P(x < 2.892) = 4.36\%$

Step-by-step explanation:

Given

$N = 700$ --- Population

$\mu = 2.894$ -- Mean

$\sigma = 0.009$ --- Standard deviation

$n = 55$ -- Sample

Required: $P(x < 2.892)$

This question will be solved using the finite correction factor

First, calculated the z score

$z = \frac{x - \mu}{\sqrt{\frac{N -n}{N -1}} * \frac{\sigma}{\sqrt n}}$

$z = \frac{2.892 - 2.894}{\sqrt{\frac{700 -55}{700 -1}} * \frac{0.009}{\sqrt {55}}}$

$z = \frac{-0.002}{\sqrt{\frac{645}{699}} * \frac{0.009}{7.42}}$

$z = \frac{-0.002}{\sqrt{0.92} * \frac{0.009}{7.42}}$

$z = \frac{-0.002}{0.95917 * 0.0012129}$

$z = -1.71$

So:

$P(x < 2.892) = P(z < -1.71)$

Using z table

$P(x < 2.892) = 0.043633$

$P(x < 2.892) = 4.36\%$

3 0

3 years ago

Casey has a loan for $400 at a rate of 13% annually. If the interest is not compounded, how much interest will he pay in 3 years

Drupady [299]

$400 * 0.13 * 3 = $156

answer is <span>C) $156.00 </span>

4 0

3 years ago

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please help meeee !!!

Len [333]

Answer:

D or A

Step-by-step explanation:

Hope this helps

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2 years ago

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If you decided to build a ramp using the 1:16 slope - ratio requirement , what would be the length of the diagonal portion of th

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3 years ago

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Which coefficient matrix represents a system of linear equations that has a unique solution ?

finlep [7]

Answer:

Option C

Step-by-step explanation:

We are given a coefficient matrix along and not the solution matrix

Since solution matrix is not given we cannot check for infinity solutions.

But we can check whether coefficient matrix is 0 or not

If coefficient matrix is zero, the system is inconsistent and hence no solution.

Option A)

|A|= $\left[\begin{array}{ccc}4&2&6\\2&1&3\\-2&3&-4\end{array}\right] =0$

since II row is a multiple of I row

Hence no solution or infinite

OPtion B

|B|= $\left[\begin{array}{ccc}2&0&-2\\-7&1&5\\4&-2&0\end{array}\right] \\=2(10)-2(10)=0$

Hence no solution or infinite

Option C

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Hence there will be a unique solution

Option D

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(since I row is -5 times III row)

Hence there will be no or infinite solution

Option C is the correct answer

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3 years ago

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