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3 years ago

If £25 = 750 rubles, how many £ are in 780 rubles?

Mathematics

1 answer:

-Dominant- [34]3 years ago

8 0

Answer:

Step-by-step explanation:

25/750=0.033333

0.033333x780=26

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For which values of k does the system of linear equations have zero, one, or an infinite number of solutions? [Note: not all thr

viktelen [127]

Answer:

The system has an infinite solution at k = 6, otherwise for any value of k, it has zero solution.

Step-by-step explanation:

Consider the system of linear equations:

$3x_{1} -x_{2}=2\;\;\;\;\;\;(1)\\ 9x_{1} -3x_{2}=k\;\;\;\;\;(2)$

The system of linear equations can have zero, one, or an infinite number of solutions:

simplify equation (1):

$x_{2}=3x_{1} -2$

substitute in equation (2), we get

$9x_{1} -3(3x_{1}-2)=k\\9x_{1} -9x_{1}+6=k\\0+6=k$

we cannot find the value of $x_{1}$ and $x_{2}$ .

so, there is no solution.

Multiply the equation (1) with 3 and put k is 6,

$3(3x_{1} -x_{2})=3\times2\\9x_{1} -3x_{2})=6$

it means both equations are overlapped. Then, the solution has infinite solutions.

Hence, the system has an infinite solutions at k is 6 otherwise for any value of k it has no solution.

4 0

3 years ago

Which of the values in the set {2, 3, 4, 5} is a solution to the equation 2x + 4 = 10?

Mrac [35]

The answer is 3 because 2(3) + 4 = 10; 6 + 4 = 10

7 0

3 years ago

Read 2 more answers

Which point is not on the graph of the function y = 3 x ? (0, 0) (5, 15) (9, 3) (7, 21)

Anna11 [10]

Answer:

(9,3)

Step-by-step explanation:

5 0

3 years ago

It's all in the photo pls help.

ivanzaharov [21]

Answer:

Answer B

Step-by-step explanation:

4 0

3 years ago

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A circular pond is to be surrounded by a gravel path. if we know the pond has a radius of 200 ft and the radius of the whole spa

Kipish [7]

To find the area to be surrounded by a gravel path, we need to calculate two areas. First, the area of the whole space and, second, the area of the pond. We subtract these values to obtain the actual area for the gravel path.

A(whole space) = pi x (250)^2 = 62500π ft^2
A(pond) = pi x 200^2 = 40000π ft^2

Actual Area = 62500π ft^2 - 40000π ft^2 = 70686 ft^2 ----> OPTION A

5 0

3 years ago