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
Alexxandr [17]
3 years ago
13

What is: Y+ 4x= 4 Y= -4x + 2

Mathematics
1 answer:
Tom [10]3 years ago
6 0
The answer to this + 2
You might be interested in
to estimate the height of the jin mao tower in shanghai , a tourist sights the top of the tower form a mirror that is 86.7 meter
Ray Of Light [21]

Answer:

The height of the tower = 420.48 meters

Step-by-step explanation:

For better understanding of the solution, see the figure attached below :

Let the height of the tower be x meters

Now, using the laws of reflection : angle of reflection = angle of incidence

Also, both the tower and the tourist are standing parallel to each other

⇒ ∠A = ∠i ( Alternate interior angles are equal)

Similarly, ∠D = ∠r ( Alternate interior angles)

But, ∠i = ∠r

⇒ ∠A = ∠D

Also, the tourist and the tower is perpendicular to the ground surface.

⇒ m∠B = m∠E = 90°

Now, in ΔABC and ΔDEC

∠A = ∠D (Proved above)

m∠B = m∠E = 90°

So, by AA postulate of similarity of triangles, ΔABC ~ ΔDEC

As the sides of similar triangles are proportional to each other

\frac{AB}{DE}=\frac{BC}{EC}\\\\\implies\frac{1.92}{x}=\frac{0.4}{87.6}\\\\\implies x=\frac{87.6\times 1.92}{0.4}\\\\\bf\implies x = 420.48\textbf{ meters}

Hence, The height of the tower = 420.48 meters

5 0
3 years ago
Use the net to compute the surface area of the three-dimensional figure.
Grace [21]

9514 1404 393

Answer:

  382 square units

Step-by-step explanation:

The central four rectangles down the middle of the net are 9 units wide, and alternate between 8 and 7 units high. Then the area of those four rectangles is ...

  9(8+7+8+7) = 270 . . . square units

The rectangles making up the two left and right "wings" of the net are 8 units high and 7 units wide, so have a total area of ...

  2×(8)(7) = 112 . . . square units

Then the area of the figure computed from the net is ...

  270 +112 = 382 . . . square units

__

<em>Additional comment</em>

You can reject the first two answer choices immediately, because they are odd. Each face will have an area that is the product of integers, so will be an integer. There are two faces of each size, so <em>the total area of this figure must be an even number</em>.

You may recognize that the dimensions are 8, 8+1, 8-1. Then the area is roughly that of a cube with dimensions of 8: 6×8² = 384. If you use these values (8, 8+1, 8-1) in the area formula, you find the area is actually 384-2 = 382. That area formula is A = 2(LW +H(L+W)).

3 0
3 years ago
Triangle OWL was rotated to create triangle O'W'L'. Describe the transformation using details and degrees.
Alisiya [41]
I believe this is a rotation through an angle of +90°, anticlockwise, (counterclockwise), with the center of rotation origin(0,0)
To describe rotation we give the center of rotation and the rotation angle in degrees stating whether it is clockwise or counterclockwise.
8 0
3 years ago
Read 2 more answers
Im happy today what about you
VARVARA [1.3K]

Answer:

yess queen

Step-by-step explanation:

why not

8 0
2 years ago
Read 2 more answers
Complete the square for the expression x^2-12x
zubka84 [21]

Answer:

Step-by-step explanation:

x²-12x+(-12/2)²=x²-12x+36=(x-6)²

6 0
3 years ago
Other questions:
  • A video sharing website starts with 20,000 members. Each year it loses 25% of the members, but adds 10,000 new members after the
    8·1 answer
  • Darin is 4 ft. 10 in. tall. His brother is 68 in. tall. How many in. taller is Darin's brother than Darin
    12·2 answers
  • What value of y makes the equation true 3 / -4 equals y / - 16
    12·3 answers
  • 30 POINTS!!!!! URGENT!
    14·2 answers
  • sorry if the pic is blurry if u can't tell what it says beside the line it says 4 in and at the bottom it says 8 in - what is th
    13·1 answer
  • So I know someone just yelled at me after I tried to help them but I need help too
    14·1 answer
  • Rewrite as a simplified fraction 2.67 repeating
    15·1 answer
  • Brian was thinking of a number . Brian doubles it and gets an answer of 93.3.what was the original number?
    6·2 answers
  • Select the story problem that this division problem represents 1/2 divided by 2/5
    9·1 answer
  • If f(x)= 3x + 1 what is is the value of x when f(x)= 15
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!