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pychu [463]
3 years ago
8

Novak hiked for 1¼ miles. After resting, he continued hiking for 2½ miles. How far did Novak hike?

Mathematics
1 answer:
kolbaska11 [484]3 years ago
3 0

Answer:

3 3/4 miles

Step-by-step explanation:

work:

1 1/4 + 2 1/2 = 3 3/4

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If the limit of f(x) as x approaches 8 is 3, can you conclude anything about f(8)?
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If the limit of f(x) as x approaches 8 is 3, can you conclude anything about f(8)? The answer is No. We cannot. See the explanation below.

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The limit of a function at a position where there is a hole in the function will exist, but the value of the function will not.

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Chose parameters h and k such that the system has a) a unique solution, b) many solutions, and c) no solution. 31+3x2= 4 2x1+kx2
Snezhnost [94]

Answer

a) k=7, h=9, the unique solution of the system is  (x_1,x_2)=(1,1)

b) If k=6 and h=8 the system has infinite solutions.

c)If k=6 and h=9 the system has no solutions.

Step-by-step explanation:

I am assuming that the system is x1+3x2=4; 2x1+kx2=h

The augmented matrix of the system is \left[\begin{array}{ccc}1&3&4\\2&k&h\end{array}\right]. If two times the row 1 is subtracted to row 2 we get the following matrix\left[\begin{array}{ccc}1&3&4\\0&k-6&h-8\end{array}\right].

Then

a) If k=7 and h=9, the unique solution of the system is x_2=\frac{9-8}{7-6}=\frac{1}{1}=1 and solviong for x_1,

x_1+3x_2=4\\\\x_1=4-3(1)=1

Then the solution is (x_1,x_2)=(1,1)

b) If k=6 and h=8 the system has infinite solutions because the echelon form of the matrix has a free variable.

c)If k=6 and h=9 the system has no solutions because the last equation of the system of the echelon form of the matrix is 0x_2=1

8 0
4 years ago
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