3 years ago

Write your answer as an integer or as a decimal rounded to the nearest tenth

Mathematics

1 answer:

Savatey [412]3 years ago

4 0

9514 1404 393

Answer:

8.7

Step-by-step explanation:

We have the side adjacent to the angle and we want the hypotenuse. The relevant trig relation is ...

Cos = Adjacent/Hypotenuse

Solving for the hypotenuse, we find ...

VW = XW/cos(36°) = 7/0.80901

VW ≈ 8.7

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The correct answer is d.

We have the following system of linear equations:

(I) $4x+7y=-14$
(II) $8x+5y=8$

Let's use the elimination method, then let's multiply the equation (1) $\times(-2)$ and subtracting (I) and (II):

(I) $-2(4x+7y)=-2(-14)$
∴ $-8x-14y=28$

(I) $-8x-14y=28$
(II) $8x+5y=8$
____________________
(III) $-9y=36$

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We can find the value of x by substituting y either in (I) or (II). Thus, from (I):

$4x+7(-4)=-14$
∴ $4x-28=-14$
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Let's substitute the values of x and y into (I) and (2)

(I) $4(\frac{7}{2})+7(-4)=14-28=-14$
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Write your answer as an integer or as a decimal rounded to the nearest tenth​

Write your answer as an integer or as a decimal rounded to the nearest tenth