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QveST [7]
3 years ago
10

Do ALL linear equations have 1 solution? Explain

Mathematics
1 answer:
schepotkina [342]3 years ago
4 0

Answer:

No

Step-by-step explanation:

A system of linear equations usually has a single solution, but sometimes it can have no solution (parallel lines) or infinite solutions (same line). This article reviews all three cases. One solution. A system of linear equations has one solution when the graphs intersect at a point.

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20 pts to whoever helps!!
VladimirAG [237]
<h3>Answer: B) 31.348</h3>

======================================

Work Shown:

We will never use the alpha = 0.05 value when computing the test statistic. So we can ignore alpha for this particular problem.

-------

n = 40 is the sample size.

s = 2.6 is the sample standard deviation

\sigma = sigma = 2.9 is the population standard deviation (ie the claimed standard deviation for all the pay phones)

Test Statistic for chi-square

\chi^2 = \frac{(n-1)*s^2}{\sigma^2}\\\\\chi^2 = \frac{(40-1)*(2.6)^2}{(2.9)^2}\\\\\chi^2 = \frac{39*6.76}{8.41}\\\\\chi^2 = \frac{263.64}{8.41}\\\\\chi^2 \approx 31.3483947681332\\\\\chi^2 \approx 31.348\\\\

7 0
3 years ago
Read 2 more answers
Suppose a system of linear equations has a 3 5 augmented matrix whose fifth column is a pivot column. is the system consistent?
likoan [24]

Answer:

The system will be inconsistent.

Step-by-step explanation:

We are given that a system of linear equations has a 3×5 augmented matrix whose fifth column is a pivot column.

Then such a system is not consistent because since the augmented matrix has a pivot in fifth column it means that the new column added to the matrix A will lead to increase in the rank as that of matrix  A.

Hence the rank of A and Augment A will not remain same and hence the system will be inconsistent.

7 0
3 years ago
Four-fifths of a number decreased by two is eighteen
hodyreva [135]
Pls mark me brainiless


(4/5)(x - 2) = 18
4(x - 2) = 90
4x = 98
x = 24 1/2
5 0
3 years ago
Cindy claims that 4^x/12^x=1/3
pav-90 [236]
A whole number that would support Cindys claim would be 2 because if u do the ,math it would be 8/24 which would be .333 repeating which is simplify to 1/3 and i do not know a number that would not work
4 0
3 years ago
An ice chest contains 2 bottles of orange juice, 5 bottles of grape juice, and 1 bottle of apple juice, all buried in ice. What’
Veronika [31]

Answer: 7/8

Step-by-step explanation:

5+2+1 =8

5+2=7

7/8

8 0
1 year ago
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