1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alona [7]
3 years ago
15

A source of laser light sends rays AB and AC toward two opposite walls of a hall. The light rays strike the walls at points B an

d C, as shown below:
A source of laser light is at point A on the ground between two parallel walls. The walls are perpendicular to the ground. AB is a ray of light which strikes the wall on the left at point B. The length of AB is 60m.AC is a ray of light which strikes the wall on the right at point C which is 40m above the ground. The ray AB makes an angle of 60 degrees with the ground. The ray AC makes an angle of 45 degrees with the ground.

What is the distance between the walls?

80 m
140 m
70 m

Mathematics
2 answers:
sergejj [24]3 years ago
8 0

Answer: 70m

Step-by-step explanation:

For wall from the left, we have a right triangle and hypotenuse is 60 and the adjacent leg is what we want to find. The angle is 60°

cos60 = x/60

1/2 = x /60

2x = 60

x = 30

For wall from the right, we have a right triangle and opposite leg is 40 and the adjacent leg is what we want to find. The angle is 45°

tan45 = 40/x

1 = 40/x

x = 40

As the distance between the walls is the sum of the bases of the triangles, 40 + 30 = 70 m

Schach [20]3 years ago
3 0
When drawn out, the answer becomes the sum of the bases of two triangles

Answer: 70 m

You might be interested in
The original sale price of an item at markdowns is $110.95. You have an additional 20% off coupon for markdowns for purchases to
IRINA_888 [86]

Answer:

$22.19

Step-by-step explanation:

20% off the original price = $110.95 - (20% x $110.95)

20% x $110.95 = $22.19

$110.95 - $22.19 = $88.76

difference = $110.95 - $88.76 = $22.19

5 0
3 years ago
Read 2 more answers
Does this graph show a function? Explain how you know.
marin [14]
Answer is (a.)
No it is not a function fails the vertical line test .
6 0
3 years ago
Read 2 more answers
I need help with 4 please
leonid [27]

Answer:

day 1 5 day 2 8 day 3 2.5 day 4 10 day 5 10 altogether is 35.5

Step-by-step explanation:

5+3=8

5/2=2.5

5*2=10

5*2=10

10+10+8+5+2.5=35.5

5 0
3 years ago
F(x) = 2x g(x) = x + 5 h(X) = 3x - 7 What is the correct set up for h(f(x))?? *
Usimov [2.4K]

Answer:

<h2>b</h2><h2 />

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Fritz benjamin buys a car costing $12300. He agrees to make payment at the end of each month period for 8 years. He pays 7.2% in
loris [4]
12300=X[((1-(1+(0.072/12)^(-12*8))/(0.072/12)]
Solve for x
X=168.92
4 0
3 years ago
Other questions:
  • A map has a scale of 1:125 000. What length on the map represent an MRT Track that is 10 km long?
    7·2 answers
  • If you have 32 gallons how many quarts do you have.
    10·2 answers
  • What is x if 5x = 30?
    5·2 answers
  • If a recipe calls for 0.800 kg of flour , about how many ounces of flour does it need? (1lb=16 oz, 1 lb = 0.454 kg )
    15·2 answers
  • How can you isolate the variable in this equation?<br><br> x + 6 = 13
    14·1 answer
  • Is -2.7,-9,-30,-100 a geometric sequence ?
    12·1 answer
  • Find the value of the variable.
    10·1 answer
  • Solve the simultaneous equations 2x+3y=9 4x+y=13
    7·1 answer
  • What is the quadratic formula ​
    7·1 answer
  • Plz help me with this
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!