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vodomira [7]
3 years ago
7

What is the value of k if k +28=56 ?

Mathematics
2 answers:
masha68 [24]3 years ago
8 0
Answer:
k=28
Explanation:
subtract 28 and 28 to get k by itself and then subtract 28 and 56 because you have to move it to the opposite side. k=56-28=28
therefore k=28
USPshnik [31]3 years ago
6 0

k = 29 i think tho

5k - 3 + 9 + k = 180

6k + 6 = 180

6k = 174

k = 29

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we will proceed to resolve each case to determine the solution

we have

2x+y>-4

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we know that

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<u>case a)</u> (5,-12)

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<u>case b)</u> (-3,0)

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<u>case c)</u> (-1,-1)

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therefore

the ordered pair(-1,-1) is a solution of the inequality

<u>case d)</u> (0,1)

Substitute the value of x and y in the inequality

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therefore

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<u>case e)</u> (4,-12)

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therefore

the ordered pair (4,-12) is not a solution of the inequality

<u>Verify</u>

using a graphing tool

see the attached figure

the solution is the shaded  area above the line

The points A,C, and D lies on the shaded area, therefore the ordered pairs A,C, and D are solution of the inequality


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