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V125BC [204]
2 years ago
11

What expression can be used for estimating 868÷28?

Mathematics
1 answer:
telo118 [61]2 years ago
3 0
So u should just do this 868÷28=31 ..ok
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A __________ is a solid figure with a rectangular base. All other faces are triangles that meet at a common vertex.
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it's caled a rectangular pyramid.

Step-by-step explanation:

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Lntegers 0, -2, -3, -4, -5, -6, -7, -8, and -10 to fill in a 3 x 3 magic square so that every row, column, and diagonal has the
kramer

The given numbers are 0, -2, -3, -4, -5, -6, -7, -8, and -10.

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Now, take the integer having the largest magnitude, i.e -10.

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Now, the row and column having 0 must have -8 and -7 to make sum -15, which disregards the possibility of -10 at the diagonal place ( figure (i)). So, proceeds with the places in figure (ii), the possible places of -8 and -7 have been shown in figure (iii).

Now, as the sum of diagonals = -15, so place -3 and -2 at diagonal positions and also place the remaining numbers -4 and -6 to make the sum of numbers in columns and rows -15 as shown in figure (iv).

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2 years ago
What is the solution of the system of linear equations?<br> -3x + 4y = -18<br> 2x - y = 77
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3 years ago
A positive integer is 2 less than another. If the sum of the reciprocal of the smaller and twice
valentinak56 [21]

Answer:

Step-by-step explanation:

Let x represent the smaller integer.

Let y represent the larger integer.

A positive integer is 2 less than another. It means that

y = x + 2

If the sum of the reciprocal of the smaller and twice the reciprocal of the larger is 11/15, it means that

1/x + 2/y = 11/15- - - - - - - - - - 1

Substituting y = x + 2 into equation 1, it becomes

1/x + 2/(x + 2) = 11/15

Considering the left hand side of the equation, it becomes

(x + 2 + 2x)/x(x + 2)

Therefore,

(3x + 2)/(x² + 2x) = 11/15

Cross multiplying, it becomes

15(3x + 2) = 11(x² + 2x)

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11x² - 23x - 30 = 0

11x² + 10x - 33x - 30 = 0

x(11x + 10) - 3(11 + 10) =℅0

(x - 3)(11x + 10) = 0

x - 3 = 0 or 11x + 10 = 0

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Since it us a positive integer, the smaller integer is 3 and the larger integer is 3 + 2 = 5

5 0
3 years ago
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