3 years ago

Evaluate 20/y - 8/x + 3xy/x+y when x=2 and y=5

Mathematics

1 answer:

Lesechka [4]3 years ago

6 0

20(5)-8(2)+3(2-5)+5
100-16-9= 79

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C+2c+12=75 find the value of c

tamaranim1 [39]

Answer:

c+2c+12=75

c = 21

Steps:

c+2c+12=75

Simplify both sides of the equation.

c+2c+12=75

(c+2c)+(12)=75(Combine Like Terms)

3c+12=75

Subtract 12 from both sides.

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The angle of elevation to the top of a skyscraper is measured to be 2 degrees from a point on the ground 1 mile from the buildin

Alex

Answer:

0.034921 miles or 1843774 feet tall

Step-by-step explanation:

Using trigonometric functions we know that $x=rcos(\theta)$ and $y=rsin(\theta)$ where $\theta$ =angle and r is the hypotenuse of the triangle.

First we will calculate the hypotenuse using the x equation, since we know x = 1 mile (distance from the building on the ground) we have:

$x=rcos(\theta)\\\\1=rcos(2)\\\\r=\frac{1}{cos(2)} \approx. 1.0061mi$

Now we will calculate the height of the building using the y equation and so:

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MAXImum [283]

U can show your work by underlining what your rounding and showing which place it is it the right of it but there is no mathematical work

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Answer:

48 (i might be wrong)

Step-by-step explanation:

180-66-66=48

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