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2 years ago

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Two buildings on level ground are 120 m and 85 m tall respectively. given that the angle of elevation of the top of the taller b

uilding from the top of the shorter building is 33.9, find the distance between the two buildings
NOTE: this question is from trigonometry

1 answer:

Luda [366]2 years ago

7 0

Answer:

(-8,-5)

Step-by-step explanation:

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Solve the equation a. 0.76, –0.76 c. 3.87 b. 4.98 d. 1.53, –1.53 Please select the best answer from the choices provided A B C D

lord [1]

You didn't write the equation you like to be solved. It is clear though, from the options you gave, that there are two equations you want to be solved simultaneously. I will give an example to illustrate this, and you may apply the process in solving your problem.

Step-by-step explanation:

Let

x + y = 7 ....................................(1)

x - 2y = -2...................................(2)

SOLVING USING THE SUBSTITUTION METHOD.

From (1), make y the subject.

y = 7 - x ....................................(3)

Substitute the value of y in (3) into (2)

x - 2(7 - x) = -2

x - 14 + 2x = -2

x + 2x = -2 + 14

3x = 12

Divide both sides by 3

x = 12/3 = 4

Now use x = 4 in (3)

y = 7 - 4 = 3

Therefore, ( x, y) = (4, 3)

SOLVING USING THE ELIMINATION METHOD.

x + y = 7 ....................................(1)

x - 2y = -2...................................(2)

First, let us eliminate x by subtracting (2) from (1)

(x + y) - (x - 2y) = 7 - (-2)

y + 2y = 7 + 2

3y = 9

Divide both sides by 3

y = 9/3 = 3

To eliminate y, first multiply (1) by 2, and add the result to (1)

2 × (1): 2x + 2y = 14 ........................(3)

................x - 2y = -2.........................(2)

____________________

...............3x = 12

............... x = 12/3 = 4

Therefore (x, y) = (4, 3)

7 0

2 years ago

Read 2 more answers

A football player kicks a football downfield. The height of the football increases until it reaches a maximum height of 15 yards

tino4ka555 [31]

Answer:

kick 1 has travelled 15 + 15 = 30 yards before hitting the ground

so kick 2 travels 25 + 25 = 50 yards before hitting the ground

first kick reached 8 yards and 2nd kick reached 20 yards

Step-by-step explanation:

1st kick travelled 15 yards to reach maximum height of 8 yards

so, it has travelled 15 + 15 = 30 yards before hitting the ground

2nd kick is given by the equation

y (x) = -0.032x(x - 50)

$y = 1.6 x - 0.032x^2$

we know that maximum height occurs is given as

$x = -\frac{b}{2a}$

$y = - \frac{1.6}{2( - 0.032)} = 25$

and maximum height is

$y = 1.6(25) - 0.032 (25)^2$

y = 20

so kick 2 travels 25 + 25 = 50 yards before hitting the ground

first kick reached 8 yards and 2nd kick reached 20 yards

6 0

2 years ago

Juan is spinning a wheel with 4 unequal spaces marked with values of $200, $300, $400, and $600. The probability of landing on $

Blababa [14]

Answer:

333 and 1000

Step-by-step explanation:

a]

The expected value of spinning the wheel is given by:

E(x)=2/9(200)+4/9(300)+2/9(400)+1/9(600)

E(x)=44 4/9+133 1/3+88 8/9+66 2/3

E(x)=333 1/3

b] The expected value of spinning the wheel thrice will be:

(expected value of spinning once)*(number of spins)

=333 1/3*3

=1000/3*3

=1000

6 0

2 years ago

Percy solved the equation x2 + 7x + 12 = 12. His work is shown below. Is Percy correct? Explain.

Anna71 [15]

I hope this helps you

5 0

2 years ago

Read 2 more answers

During a bike challenge, riders have to collect various colored ribbons. Each 1/2 mile they collect a red ribbon, each 1/8 mile

Marizza181 [45]

<span>
Plus every fraction you will get 7/8
And the question says about the ribbons he will get at 3/4 miles

so let the whole road is 1

so, according to the equation ; (1-7/8) = 1/8

and (1-1/4) = 3/4

so the answer is green and blue
</span>

6 0

2 years ago

Read 2 more answers