Question: The angle of elevation of a building 80 m high from a man on the ground is 50.41 degrees. How far is the man from the building?
This is a very simple trigonometry question. The ground, the building, and the angle of elevation represent a right angle triangle with an angle α of 50.41° between the hypotenuse(The line of sight from the man’s eye to the top of the building) and the ground. The tangent of this angle is the opposite which is the building elevation of 80m divided by the adjacent which is the unknown horizontal distance between the man and the building. This distance denoted by X is what we are looking to determine.
In math form, we have the equation tanα = 80 m / X and X (tanα) = 80m divide by tanα
X = 80m / tanα = 80m / tan 50.41° = 66.2 m
The sum of two numbers is 46. When 30 is subtracted from 5 times the smaller the result is 3 times the larger. Determine the numbers.
Let x be the smaller number and y be the larger number.
equation 1: x + y = 46 —>—->—->—-> y = 46 – x
equation 2: 5x – 30 = 3y
sub (equation 1) in (equation 2);
5x – 30 = 3y y= 46 -x
5x – 30 = 3( 46 – x) y = 46 – 21
5x – 30 = 138 – 3x y = 25
-30 – 138 = -3x – 5x
-168 = -8x
x = 21
.*. The smaller number is 21 and the larger number is 25
A play needs three protagonists (a man, a woman, and a girl), two antagonists (a man and a woman), and two supporting roles (a man and a boy).
Six men, six women, three boys, and four girls attended the auditions. The number of ways the roles can be cast is:
woman can be protagonists or antagonists
six women are there
2 women can be selected in ⁶C₂ = 15 ways and can be assigned role in 2! = 2 ways
Hence total ways role to woman can be assigned = 15 x 2 = 30
Man can be protagonists , antagonists , supporting role
six men are there
3 men can be selected in ⁶C₃ =20 ways and can be assigned role in 3! = 6 ways
Hence total ways role to woman can be assigned =20 x 6 = 120
Girl can be protagonists
There are 4 girls
Hence 4 ways
Boy can be supporting roles
There are 3 boys
Hence 3 ways
Total Ways = 30 x 120 x 4 x 3
The number of ways the roles can be cast is: 43200
Here is a pyramid with a base that is a pentagon with all sides the same length. Describe the cross section that will result if the pyramid is sliced
a. horizontally (parallel to the base)
b. vertically through the top vertex (perpendicular to the base)
What is the quotient of (xº + 8) = (x + 2)?
O x2 + 2x + 4
x² – 2x + 4
o x² + 4
O x² – 4
Determine the value(s) for which the rational expression −3z+66z2+14z−80 is undefined
For lines a, c, and d, line c is parallel to line d and m∠1 = 55°.
: For the given diagram, use the measure of ∠1 to find the measure of the remaining seven angles.
: In two or more complete sentences, explain the relationship between angle pairs a)∠1 and ∠7 and b)∠1 and ∠2. in your explanation, include how you calculated each of the angle measures in the special angle pairs.
A person runs 1 4/5 miles in 1/5 of an hour determine how many miles they are running per hour
Dostaniecie 5 gwiazdek i serce a może nawet naj jak odpowiecie na następujące pytanie: wypisz pięć kolejnych różnic od 0
wielokrotności liczby 45:
wielokrotności liczby 18:
jaka jest najmniejsza wspólna wielokrotność liczb 45 i 18?
5 pounds of apples cost $8.20. How much is it for 1 pound .
free if you also answer my riidle what goes and comes out it happends at dusk what is it A. sex B, poop C. nothing D. this is a stupid riddle