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Mekhanik [1.2K]
3 years ago
7

Solve for b. d = 3a + 3b A. b=d−3a B. b=3a−d/3 C. b=d−3a/a D. b=d−3a/3

Mathematics
1 answer:
Luda [366]3 years ago
3 0

<u><em>The correct answer here is d</em></u>

d = 3a + 3b

d - 3a = 3b

d - 3a/3 = b

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liberstina [14]

Answer:

(3, -8) and (2, -10)

Step-by-step explanation:

Given

10x + 4y < 12

8x - 3y > 20

Required

Select the true coordinate points in (3, -8) (2, 5) (-5, 1) (10, 3) (2, -10)

(3, -8)

x = 3 and y = -8

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10 * 3 + 4 * -8 < 12

30 - 32 < 12

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8x - 3y > 20

8 * 3 - 3 * -8> 20

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(2, 5)

x = 2 and y = 5

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10 * 2 + 4 * 5 < 12

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(-5, 1)

x = -5 and y = 1

10x + 4y < 12

10 * -5 + 4 * 1 < 12

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8 * -5 - 3 * 1 > 20

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(10, 3)

x = 10 and y = 3

10x + 4y < 12

10 * 10 + 4 * 3 < 12

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(2, -10)

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10x + 4y < 12

10 * 2 + 4 * -10 < 12

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8x - 3y > 20

8 * 2 - 3 * -10 > 20

46 > 20 --- True

Hence, the solution to the inequalities are:

(3, -8) and (2, -10)

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