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
damaskus [11]
3 years ago
11

The aspect ratio of a rectangular shape is it's length divided by it's width (L/W). If the aspect ratio of a chalkboard is 4:3 a

nd the width is 5 in, what is the length of the chalkboard? A. 6.67 in B. 9.33 in C. 12 in D. 14 in

Mathematics
1 answer:
saul85 [17]3 years ago
5 0
The answer is C. 12in
You might be interested in
The radius of a circle is never a chord true or false
frez [133]
True, because the chord connect 2 points of the circumference, but radius connect the center and a point on the circumference.
8 0
3 years ago
It’s a yes or no question<br> !!!!!!!!!!!!<br> For math
vesna_86 [32]
I’m confused on what the question is exactly
5 0
2 years ago
Help!! 50 points and brainliest!
Viktor [21]

Answer:

Second choice:

x=2t

y=4t^2+4t-3

Fifth choice:

x=t+1

y=t^2+4t

Step-by-step explanation:

Let's look at choice 1.

x=t+1

y=t^2+2t

I'm going to subtract 1 on both sides for the first equation giving me x-1=t. I will replace the t in the second equation with this substitution from equation 1.

y=(x-1)^2+2(x-1)

Expand using the distributive property and the identity (u+v)^2=u^2+2uv+v^2:

y=(x^2-2x+1)+(2x-2)

y=x^2+(-2x+2x)+(1-2)

y=x^2+0+-1

y=x^2

So this not the desired result.

Let's look at choice 2.

x=2t

y=4t^2+4t-3

Solve the first equation for t by dividing both sides by 2:

t=\frac{x}{2}.

Let's plug this into equation 2:

y=4(\frac{x}{2})^2+4(\frac{x}{2})-3

y=4(\frac{x^2}{4})+2x-3

y=x^2+2x-3

This is the desired result.

Choice 3:

x=t-3

y=t^2+2t

Solve the first equation for t by adding 3 on both sides:

x+3=t.

Plug into second equation:

y=(x+3)^2+2(x+3)

Expanding using the distributive property and the earlier identity mentioned to expand the binomial square:

y=(x^2+6x+9)+(2x+6)

y=(x^2)+(6x+2x)+(9+6)

y=x^2+8x+15

Not the desired result.

Choice 4:

x=t^2

y=2t-3

I'm going to solve the bottom equation for t since I don't want to deal with square roots.

Add 3 on both sides:

y+3=2t

Divide both sides by 2:

\frac{y+3}{2}=t

Plug into equation 1:

x=(\frac{y+3}{2})^2

This is not the desired result because the y variable will be squared now instead of the x variable.

Choice 5:

x=t+1

y=t^2+4t

Solve the first equation for t by subtracting 1 on both sides:

x-1=t.

Plug into equation 2:

y=(x-1)^2+4(x-1)

Distribute and use the binomial square identity used earlier:

y=(x^2-2x+1)+(4x-4)

y=(x^2)+(-2x+4x)+(1-4)

y=x^2+2x+-3

y=x^2+2x-3.

This is the desired result.

3 0
3 years ago
Read 2 more answers
Chelsey put $450 off bro an account with an interest rate of 2.5% when she withdrew her money she had earned $67.50 in interest
AysviL [449]

~~~~~~ \textit{Simple Interest Earned} \\\\ I = Prt\qquad \begin{cases} I=\textit{interest earned}\dotfill &\$67.50\\ P=\textit{original amount deposited}\dotfill & \$450\\ r=rate\to 2.5\%\to \frac{2.5}{100}\dotfill &0.025\\ t=years \end{cases} \\\\\\ 67.50 = (450)(0.025)(t)\implies \cfrac{67.50}{(450)(0.025)}=t\implies 6=t

7 0
2 years ago
The second quartile of a data set is 4.2. Which statement about the data values is true?
Setler [38]
The second quartile is also the median. which is 50% of the data. So 1/2 of the data lies below it, and 1/2 of the data lies above it.
the correct answer would be A. the data value of 2.5 will lie below the second quartile.
6 0
3 years ago
Read 2 more answers
Other questions:
  • 3D shape practice. I'm stuck in this problem. Pleas help.
    11·1 answer
  • Solve: 2/3 x = 8 <br> A.4<br> B.12
    5·2 answers
  • 1) The figure at the top is a parallelogram; the area is A = bh; where b is the base and h is the height; use properties of spec
    5·1 answer
  • The French Club is sponsoring a bake sale. If their goal is to raise at least $140, how many pastries must they sell at $3.50 ea
    8·1 answer
  • g A psychic was tested for extrasensory perception (ESP). The psychic was presented with cards face down and asked to determine
    12·2 answers
  • A model rocket is launched from a raised platform at a speed of 144 feet per second. Its height in feet is given by h(t) = -16t
    9·1 answer
  • (2) Clare said that 4/3:5/2 is 10/3. She reasoned: 4/3.5=20/3 and 20/3:2=10/3.
    14·2 answers
  • Find the missing side. <br> Need help please.<br> Need to show how to get the answer.
    5·1 answer
  • HELP ASAP! I’m very confused and need help! Thank you!
    15·1 answer
  • Use the Pythagorean theorem to prove whether or not each set of numbers represent the side lengths of a right triangle.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!