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Reika [66]
3 years ago
8

The difference between a number b and 7.4 is -6.8

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
3 0

Hello from MrBillDoesMath!

Answer:

b = 0.6


Discussion:

The question can be written as

b - 7.4 = -6.8  =>           (now add 7.4 to each side)

b - 7.4 + 7.4 = -6.8 + 7.4 =>       ( note: -7.4 + 7.4 = 0)

b = 0.6

Thank you,

MrB


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When we are given 3 sides, we try to solve the angles first by using the
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cos (A) = [1,849 + 289 -729] / <span> <span> <span> 1,462
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Angle A = 15.475

Now that we have one angle, we next can use the
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sin(B) / side b = sin(A) / side a
sin(B) = sin(A) * sideb / sidea
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sin (B) = </span><span>0.424935555555</span>
Angle B = 25.147 Degrees
Remember the arc sine (<span>0.424935555555) also equals </span> <span> <span> <span> 154.85

</span></span></span>Finally, calculating the third angle is quite easy
Angle C =  180 - Angle (A) - Angle(B)
Angle C =  180 - 15.475 - 154.85
Angle C =  9.675

Source:
http://www.1728.org/trigtut2.htm


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