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lisov135 [29]
3 years ago
8

SOMEONE HELP ASAPPPPPPP!!! PLEASE

Mathematics
1 answer:
Rom4ik [11]3 years ago
4 0
(1) See below for a diagram. Basically, the distance on the ground from the person to the building (34 ft) is adjacent to the angle of elevation (74 degrees) and the height of the building (labeled h in the diagram) is the side opposite the angle. Since we are dealing with opposite and adjacent we use the tangent of the angle and tan = opp/adj

Specifically, tan74= \frac{h}{34}
h=(34)(tan74)<span class="_wysihtml5-temp-placeholder"></span>
h=118.6 feet.

Please be sure your calculator is set to degrees (not radians) when you do this problem.

(2) Here since P & Q are complimentary it means that their sum is 90 degrees. Since this is a right triangle that means that the remaining angle (R) must be the right angle. See below for a diagram.

sin = opp/hyp. As the sin Q =  9/41 this means that 9 is the length of the side opposite Q (the side PR) and 41 is the length of the hypotenuse. This makes the remaining side (QR) 40 in length.

cos = adj/hyp. If we focus on angle P the side adjacent (next to) is 9 and the hypotenuse is 41. Thus the cos of P = 9/41.

You could have also realized that if P & Q are complimentary the sin P = cos Q and the cos P = sin Q. We were not asked about tangent but it is also the case that tan P = cot Q and cot P = tan Q.

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Answer these questions with work
sweet-ann [11.9K]
First, you make 9 into a fraction which would become 36/4
then, subtract 9/4 from both sides so that would give you 3/4x = 27/4
then divide each side by 3/4 (same thing as multiply by its reciprocal) and that would give you x=9
7 0
3 years ago
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The equation of a line is -2x+5y=-20.<br> What is the x-intercept of the line?
fomenos

The x intercept of the given line is (10, 0)

<h3>Finding the x intercept of a line</h3>

The x intercept of a line is the point where the line crosses the x-axis

It is the point where the value of y is zero

Given the equation of a line -2x+5y = -20

Substitute y = 0 into the equation

-2x +5(0) = -20

-2x = -20

x = 10

Hence the x intercept of the given line is (10, 0)

Learn more on x intercept here;brainly.com/question/17932786

#SPJ1

6 0
2 years ago
PLEASEE HELLPPPPP<br><br> ........................................
anygoal [31]

Answer:

20

25

10

Step-by-step explanation:

8 0
3 years ago
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Who can help me on my math I’m failing can y’all please help me on some questions.
Gemiola [76]

Answer:

7 quarters, 8 nickels

Step-by-step explanation:

So the system of equations you have is:

x + y = 15

0.25x + 0.05y = 2.15

Here's how to solve:

first, multiply both sides of the equation 0.25x + 0.05y = 2.15 by 100 to get rid of the decimal places:

25x + 5y = 215

Then, you can divide both sides by 5 to simplify it more:

5x + y = 43

Now, you have the system of equations:

5x + y = 43

x + y = 15

Now subtract the two equations:

4x = 28

divide both sides by 4

x = 7

plug x = 7 into the equation x + y = 15 to solve for y:

7 + y = 15

subtract 7 from both sides

y = 8

So you know that there are 7 quarters and 8 nickels.

3 0
3 years ago
Read 2 more answers
What’s number one and how do You do it
Aliun [14]
I'm assuming you mean #10?

So we're given this equation:

b - 5 = - 5

In this equation, we a variable of <em>b</em>. We want to solve for <em>b</em> by isolating it, or setting it alone. We see that on the side with <em>b</em> on it, it is being subtracted by 5. We want to the opposite in order to isolate <em>b</em>.

Remember that when you do one thing to one side of the equation, you must do it to the other side as well. We can add 5 on both sides to cancel out the negative 5 on the left.

b - 5 = -5&#10;&#10;add 5 on both sides&#10;&#10;b - 5 + 5 = -5 + 5&#10;&#10;simplify&#10;&#10;b = 0

Therefore we know that <em>b</em> does not equal -10, which can be represented as:

b  \neq  -10

So you have to (a) color the hair yellow.
5 0
4 years ago
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