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
butalik [34]
3 years ago
10

Arnold needs to simplify the expression below.

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
3 0
I believe answer choice C is the answer. You would solve whatever is inside of the parentheses first because of PEMDAS.
You might be interested in
Solve algebraically the simultaneous equations
Bess [88]

Answer:waffle

Step-by-step explanation:

Basically ill tell you the answer if it says it helped you

8 0
2 years ago
What is the unit rate of -4y = 18x
Wittaler [7]

Answer:

Step-by-step explanation:

3 0
3 years ago
What value(s) of x make the following expression undefined? x^2+ 1
allsm [11]

Answer:x=2

Step-by-step explanation: 2x-4=0

2x-4=0

+4 +4

2x=4

2x/2=4/2

X=2

5 0
3 years ago
Describe how you would find the area of the figure shown at the right.
nikklg [1K]
I would find the area of the shape as if it were a rectangle (5x9) and then subtract the area of two triangles (1/2x2x2.5)
4 0
3 years ago
Read 2 more answers
A 75-gallon tank is filled with brine (water nearly saturated with salt; used as a preservative) holding 11 pounds of salt in so
Debora [2.8K]

Let A(t) = amount of salt (in pounds) in the tank at time t (in minutes). Then A(0) = 11.

Salt flows in at a rate

\left(0.6\dfrac{\rm lb}{\rm gal}\right) \left(3\dfrac{\rm gal}{\rm min}\right) = \dfrac95 \dfrac{\rm lb}{\rm min}

and flows out at a rate

\left(\dfrac{A(t)\,\rm lb}{75\,\rm gal + \left(3\frac{\rm gal}{\rm min} - 3.25\frac{\rm gal}{\rm min}\right)t}\right) \left(3.25\dfrac{\rm gal}{\rm min}\right) = \dfrac{13A(t)}{300-t} \dfrac{\rm lb}{\rm min}

where 4 quarts = 1 gallon so 13 quarts = 3.25 gallon.

Then the net rate of salt flow is given by the differential equation

\dfrac{dA}{dt} = \dfrac95 - \dfrac{13A}{300-t}

which I'll solve with the integrating factor method.

\dfrac{dA}{dt} + \dfrac{13}{300-t} A = \dfrac95

-\dfrac1{(300-t)^{13}} \dfrac{dA}{dt} - \dfrac{13}{(300-t)^{14}} A = -\dfrac9{5(300-t)^{13}}

\dfrac d{dt} \left(-\dfrac1{(300-t)^{13}} A\right) = -\dfrac9{5(300-t)^{13}}

Integrate both sides. By the fundamental theorem of calculus,

\displaystyle -\dfrac1{(300-t)^{13}} A = -\dfrac1{(300-t)^{13}} A\bigg|_{t=0} - \frac95 \int_0^t \frac{du}{(300-u)^{13}}

\displaystyle -\dfrac1{(300-t)^{13}} A = -\dfrac{11}{300^{13}} - \frac95 \times \dfrac1{12} \left(\frac1{(300-t)^{12}} - \frac1{300^{12}}\right)

\displaystyle -\dfrac1{(300-t)^{13}} A = \dfrac{34}{300^{13}} - \frac3{20}\frac1{(300-t)^{12}}

\displaystyle A = \frac3{20} (300-t) - \dfrac{34}{300^{13}}(300-t)^{13}

\displaystyle A = 45 \left(1 - \frac t{300}\right) - 34 \left(1 - \frac t{300}\right)^{13}

After 1 hour = 60 minutes, the tank will contain

A(60) = 45 \left(1 - \dfrac {60}{300}\right) - 34 \left(1 - \dfrac {60}{300}\right)^{13} = 45\left(\dfrac45\right) - 34 \left(\dfrac45\right)^{13} \approx 34.131

pounds of salt.

7 0
2 years ago
Other questions:
  • Bernie bought a tie for 15% off its full price . What was the full price of the tie if Bernie paid $20.74 before sales tax?
    9·1 answer
  • What is the algebraic expression that best describes the sequence 2, 4, 8, 16, 32?
    12·1 answer
  • Read the attachment and complete the question in the attachment
    11·1 answer
  • What is the y-intercept of the graph of the function f(x)=x^2+3x+5?
    15·2 answers
  • __________ reasoning is a type of reasoning that uses previously proven or accepted properties to reach conclusions.
    6·1 answer
  • Please help I'll give 40 points
    12·1 answer
  • I really need help with this Triangle problem. ​
    6·1 answer
  • What is the solution to the following system of equations?
    9·1 answer
  • Can someone plz help me with this one problem plz!!!
    9·1 answer
  • how do i find a tutor for this question did they remove the tutors and if you know how to solve his please help...
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!