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frosja888 [35]
2 years ago
11

Which equation is equivalent to 3 (5x – 4) = 2 (7x)? A. 5x - 4 = 142

Mathematics
1 answer:
KonstantinChe [14]2 years ago
5 0

Step-by-step explanation:

3(5x - 4) = 2(7x)

=> 15x - 12 = 14x

=> x = 12

<em>By the options given, I would say none of the options are correct!</em>

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(Law of Sines)
Mariana [72]

Answer:

Option (D) is correct.

Step-by-step explanation:

In a triangle BCD , with b, c, d as the sides of triangle.

Sine rule states when we we divide side b by the sine of angle B then it is equal to side c divided by the sine of angle C and also equal to side d divided by the sine of angle D.

Using Sine rule,

\frac{b}{\sin B}=\frac{c}{\sin C}=\frac{d}{\sin D}

Consider the first and third ratio,

\frac{b}{\sin B}=\frac{d}{\sin D}

Substitute the values of d = 3 , b= 5 and ∠D=25°

\Rightarrow \frac{5}{\sin B}=\frac{3}{\sin 25^{\circ}}

\Rightarrow \sin B=\frac{\sin 25^{\circ} \times 5}{3}}  

 \Rightarrow \sin B=45,135

Thus, Measure of angle B is 45 and 135 as sinB is positive is first and 2nd quadrant.

Thus, option (D) is correct.


7 0
3 years ago
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Answer:

Step-by-step explanation:

2nd one

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