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
ANTONII [103]
2 years ago
12

James is trying to determine the height of a building, so he uses a street sign as a reference. The street sign is 6 feet tall a

nd casts a shadow of 3 feet. The two triangles formed in the picture above are similar.
If the building casts a shadow of 21 feet, what is the height of the building?
A.45 feet
B.42 feet
C.63 feet
D.11 feet
Mathematics
2 answers:
katrin2010 [14]2 years ago
8 0

Answer:

B

Step-by-step explanation:

Alisiya [41]2 years ago
4 0
The answer should be B
You might be interested in
What is the slope of the line?
serious [3.7K]

-8/5x is the slope of the line.

3 0
2 years ago
Please help answer this if your able two :)) ♡
andreev551 [17]
Answer:

Y + 3= 3/4( x - 7)
8 0
3 years ago
Read 2 more answers
Let f(x)=3x+1 and g(x)=2x2−1<br> Find f(g(2))<br><br><br> 10<br><br> 22<br><br> 97<br><br> 28
kupik [55]

Answer:

f(g(2)) = 22

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS

<u>Algebra I</u>

  • Composition of functions

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = 3x + 1

g(x) = 2x² - 1

<u>Step 2: Find g(2)</u>

  1. Substitute:                    g(2) = 2(2)² - 1
  2. Evaluate:                       g(2) = 2(4) - 1
  3. Multiply:                        g(2) = 8 - 1
  4. Subtract:                       g(2) = 7

<u>Step 3: Find f(g(2))</u>

  1. Define:                    g(2) = 7
  2. Rewrite:                   f(7)
  3. Substitute:               f(7) = 3(7) + 1
  4. Multiply:                   f(7) = 21 + 1
  5. Add:                         f(7) = 22

And we have our final answer!

6 0
2 years ago
Write an equation that goes through (8,1) and is perpendicular to 2y + 4x =12
Serggg [28]

Answer:

2y -x + 6 = 0

Step-by-step explanation:

Here a equation and a point is given to us and we are interested in finding a equation which is perpendicular to the given equation and passes through the given point .

The given equation is ,

\sf \longrightarrow 2y + 4x = 12 \\

\sf \longrightarrow 4x + 2y = 12

Firstly convert this into slope intercept form , to find out the slope of the line.

\sf \longrightarrow 2y = -4x +12\\

\sf \longrightarrow y =\dfrac{-4x+12}{2}\\

\sf \longrightarrow y =\dfrac{-4x}{2}+\dfrac{12}{2}\\

\sf \longrightarrow \red{ y = -2x + 6 }

Now on comparing it to slope intercept form which is y = mx + c , we have ,

  • m = -2

And as we know that the product of slopes of two perpendicular lines is -1 . So the slope of the perpendicular line will be negative reciprocal of the slope of the given line. Therefore ,

\sf \longrightarrow m_{\perp}=\dfrac{-1}{-2}=\red{\dfrac{1}{2}}

Now we may use the point slope form of the line to find out the equation of the line using the given point . The point slope form is,

\sf \longrightarrow y - y_1 = m(x - x_1)

Now on substituting the respective values we have,

\sf \longrightarrow y - 1 = \dfrac{1}{2}(x-8)\\

\sf \longrightarrow 2(y-1 )= x -8 \\

\sf \longrightarrow 2y -2=x-8\\

\sf \longrightarrow \underline{\boxed{\bf 2y - x + 6=0}}

5 0
2 years ago
Can someone answer 15 and 16 please I will mark u as brainliest
kifflom [539]

Answer:

just graph the problem so that you can answer

8 0
3 years ago
Other questions:
  • The polynomial function f(x) is a fourth degree polynomial. Which of the following could be the complete list of the roots of f(
    6·2 answers
  • -5x - -4x - 10 = ?<br>Please Help Me!​
    10·1 answer
  • Please help me idk this
    15·1 answer
  • Henry is three more than twice Nicholas’ age. Marcus is 9 less than six times Nicholas’s age. If Henry and Marcus are twins, how
    7·1 answer
  • How do you write 84% as a fraction?
    15·2 answers
  • I don't understand this
    10·2 answers
  • Jim’s pay is £180 each week.
    12·1 answer
  • pleaseee fast help me......................prove that the valueof x obtained by sloving 7^x+1/7^x=49*1/49 also satisfy 2^x-2^2=2
    5·1 answer
  • I really need help fast and ill do anything just help me plz
    13·1 answer
  • Please helppppp giving brainlest please!! thank you
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!