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stealth61 [152]
3 years ago
9

HELPPPP !!!

Mathematics
1 answer:
Irina-Kira [14]3 years ago
7 0

Answer:

b. 5x6

Step-by-step explanation:

Since we know that in order for a matrix multiplication to be defined, the number of columns in the first matrix must be equal to the number of rows in the second matrix.

We have been given the dimensions of a matrix as: 3 by 5, which means that the number of rows in the given matrix is 3 and number of columns is 5.

In order to multiply our matrix F with another matrix, the number of rows in the another matrix must be equal to 5.    

Now let us see our given choices one by one.

a.  3x5

Upon looking at our first option we can see that number of rows in this matrix is 3 and number of columns of our matrix F is 5. 3 is not equal to 5, therefore, option a is not a correct choice.

b. 5x6  

Number of rows of the matrix provided in option b is 5 and number of columns of our matrix F is also 5, therefore, option b is the correct choice.

c. Since we know that multiplication of matrices is possible with compatible dimensions, therefore, option c is not a correct choice.  

d. As we already found our correct option, therefore, 'none of the choices work' is not a correct choice.

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2m+5=5(m-7)-3m equals??
Svetradugi [14.3K]
2m+5=5(m-7)-3m
first, use distributive property...
2m+5=5m-35-3m
next, combine like terms on the right side...
2m+5=2m-35
next, subtract 2m from both sides.
2m+5=2m-35
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you will get....
5=-35 in which is not true. This means the equation has no solution.
6 0
3 years ago
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Best known for its testing program, ACT, Inc., also compiles data on a variety of issues in education. In 2004 the company repor
GarryVolchara [31]

Answer:

\mu_p -\sigma_p = 0.74-0.0219=0.718

\mu_p +\sigma_p = 0.74+0.0219=0.762

68% of the rates are expected to be betwen 0.718 and 0.762

\mu_p -2*\sigma_p = 0.74-2*0.0219=0.696

\mu_p +2*\sigma_p = 0.74+2*0.0219=0.784

95% of the rates are expected to be betwen 0.696 and 0.784

\mu_p -3*\sigma_p = 0.74-3*0.0219=0.674

\mu_p +3*\sigma_p = 0.74+3*0.0219=0.806

99.7% of the rates are expected to be betwen 0.674 and 0.806

Step-by-step explanation:

Check for conditions

For this case in order to use the normal distribution for this case or the 68-95-99.7% rule we need to satisfy 3 conditions:

a) Independence : we assume that the random sample of 400 students each student is independent from the other.

b) 10% condition: We assume that the sample size on this case 400 is less than 10% of the real population size.

c) np= 400*0.74= 296>10

n(1-p) = 400*(1-0.74)=104>10

So then we have all the conditions satisfied.

Solution to the problem

For this case we know that the distribution for the population proportion is given by:

p \sim N(p, \sqrt{\frac{p(1-p)}{n}})

So then:

\mu_p = 0.74

\sigma_p =\sqrt{\frac{0.74(1-0.74)}{400}}=0.0219

The empirical rule, also referred to as the three-sigma rule or 68-95-99.7 rule, is a statistical rule which states that for a normal distribution, almost all data falls within three standard deviations (denoted by σ) of the mean (denoted by µ). Broken down, the empirical rule shows that 68% falls within the first standard deviation (µ ± σ), 95% within the first two standard deviations (µ ± 2σ), and 99.7% within the first three standard deviations (µ ± 3σ).

\mu_p -\sigma_p = 0.74-0.0219=0.718

\mu_p +\sigma_p = 0.74+0.0219=0.762

68% of the rates are expected to be betwen 0.718 and 0.762

\mu_p -2*\sigma_p = 0.74-2*0.0219=0.696

\mu_p +2*\sigma_p = 0.74+2*0.0219=0.784

95% of the rates are expected to be betwen 0.696 and 0.784

\mu_p -3*\sigma_p = 0.74-3*0.0219=0.674

\mu_p +3*\sigma_p = 0.74+3*0.0219=0.806

99.7% of the rates are expected to be betwen 0.674 and 0.806

5 0
3 years ago
My teacher won't help i I actually want to learn this can you please help me​
Reika [66]
15 you have to do all the steps thank it this I think
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d1i1m1o1n [39]

Answer:

63

Step-by-step explanation:

4 0
3 years ago
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55.563 the nearest hundredth
Damm [24]

Answer:

55.56

Step-by-step explanation:

If its 5 or mor add one more if its four or less let it rest

6 0
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