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faltersainse [42]
2 years ago
6

Y=6x-11 -2x-3y=-7 please help and hurry please

Mathematics
1 answer:
Vadim26 [7]2 years ago
3 0

Step-by-step explanation:

Solve by substitution (Assumption)

Given:

[1] y = 6x - 11

[2] -2x-3y = -7

Using [1] substitute  (6x-11) for y in [2]

[3] -2x-18x+33=-7

Simplifying

[4] 20x=40

[5] x = 2

Using [5] substitute 4 for x in [1]

[6] y= 12 - 11

[7] y = 1

Solution is (x,y)=(2,1)

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ANSWER

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EXPLANATION

The law of cosine is given by the formula:

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From the diagram,

a=17, b=8, c=16

We substitute the given values into the formula to obtain:

{8}^{2} = {17}^{2} + {16}^{2} - 2(17)(16)\cos(B)

64 = 289+ 256- 544\cos(B)


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64 - 545 = - 544\cos(B)

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3 years ago
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