Answer: the height of the streetlight is 19.47 feet
Step-by-step explanation:
The height of Laura Bernett is 5 ft-4 inches.
12 inches = 1 foot
4 inches = 4/12 = 1/3 foot
Therefore, her height is
5 + 1/3 = 16/3 foot
The diagram of the scenario is shown in the attached photo
The right angle triangle ABC and EBD formed are similar.
h represents the height of the streetlight
Total length of AB = 12 + 5 = 17 feet
Considering triangle BDE,
To determine the angle formed, θ, we would apply trigonometric ratio
Tan θ = opposite side/adjacent side
Tan θ = (16/3)/5 = 1.067
θ = 46.86 degrees
Considering triangle ABC,
Tan θ = h/AB
Tan 48.86 = h/17
h = 17tan48.86 = 17 × 1.145
h = 19.465
To the nearest hundredth,
h = 19.47 feet
System 1: The solution is (x, y) = (-4, 5)
System 2: The solution is 
<em><u>Solution:</u></em>
<em><u>Given system of equations are:</u></em>
2x + 3y = 7 ------ eqn 1
-3x - 5y = -13 --------- eqn 2
We can solve by elimination method
Multiply eqn 1 by 3
6x + 9y = 21 ------ eqn 3
Multiply eqn 2 by 2
-6x - 10y = -26 ------- eqn 4
Add eqn 3 and eqn 4
6x + 9y -6x - 10y = 21 - 26
-y = -5
y = 5
Substitute y = 5 in eqn 1
2x + 3(5) = 7
2x + 15 = 7
2x = -8
x = -4
Thus the solution is (x, y) = (-4, 5)
<h3><em><u>
Second system of equation is:</u></em></h3>
8 - y = 3x ------ eqn 1
2y + 3x = 5 ----- eqn 2
We can solve by susbtitution method
From given,
y = 8 - 3x ----- eqn 3
Substitute eqn 3 in eqn 2
2(8 - 3x) + 3x = 5
16 - 6x + 3x = 5
3x = 16 - 5
3x = 11

Substitute the above value of x in eqn 3
y = 8 - 3x

Thus the solution is 
Answer:
I think the answer is orange 17
Step-by-step explanation:
Answer:
Step-by-step explanation: The student divided the number of wins by the number of losses.
The student should have divided the number of wins by the total number of games.
The student should have first added 20 and 10 to find that there were a total of 30 games.
Answer:
h = 13cm and b= 54cm.
Step-by-step explanation:
We have that the area
and the base is two centimeters longer than four times the height, that is

where b is the base and h the height. Now, the area is



.
Now, we are going to use the general formula to solve quadratic ecuations:

where a=4, b= 2 and c= -702.



or 
As we are searching for the lenght, we choose the positive result:

.