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
Paha777 [63]
3 years ago
15

Evaluate the function: f(x)= 2x+5, for x=3

Mathematics
2 answers:
JulijaS [17]3 years ago
8 0
Replace X with 3 and simplify. The answer you would get is 11.
Paha777 [63]3 years ago
3 0
2(-3)+5=-6+5=-1 negative 1
You might be interested in
Can you please help me on 2 and 3?
dexar [7]
Cant see it its cut off
4 0
3 years ago
After swimming 50 feet below the surface of the water, a
marissa [1.9K]

Answer:

20, c

Step-by-step explanation:

50-30=20 Go 50 down a number line from 50, you're at 0, then go back up 30. Where are you at? 20 Hope this helps! Have a good day! :)

7 0
3 years ago
A colony of bacteria is growing at a rate of 0.2 times its mass. Here time is measured in hours and mass in grams. The mass of t
11Alexandr11 [23.1K]

Answer:

  • <u>Question 1:</u>      dm/dt=0.2m<u />

<u />

  • <u>Question 2:</u>     m=Ae^{(0.2t)}<u />

<u />

  • <u>Question 3:</u>      m=10e^{(0.2t)}<u />

<u />

  • <u>Question 4:</u>      m=10g<u />

Explanation:

<u>Question 1: Write down the differential equation the mass of the bacteria, m, satisfies: m′= .2m</u>

<u></u>

a) By definition:  m'=dm/dt

b)  Given:  rate=0.2m

c) By substitution:  dm/dt=0.2m

<u>Question 2: Find the general solution of this equation. Use A as a constant of integration.</u>

a) <u>Separate variables</u>

     dm/m=0.2dt

b)<u> Integrate</u>

           \int dm/m=\int 0.2dt

            ln(m)=0.2t+C

c) <u>Antilogarithm</u>

       m=e^{0.2t+C}

       m=e^{0.2t}\cdot e^C

         e^C=A\\\\m=Ae^{(0.2t)}

<u>Question 3. Which particular solution matches the additional information?</u>

<u></u>

Use the measured rate of 4 grams per hour after 3 hours

            t=3hours,dm/dt=4g/h

First, find the mass at t = 3 hours

            dm/dt=0.2m\\\\4=0.2m\\\\m=4/0.2\\\\m=20g

Now substitute in the general solution of the differential equation, to find A:

          m=Ae^{(0.2t)}\\\\20=Ae^{(0.2\times 3)}\\\\A=20/e^{(0.6)}\\\\A=10.976

Round A to 1 significant figure:

  • A = 10.

<u>Particular solution:</u>

           

             m=10e^{(0.2t)}

<u>Question 4. What was the mass of the bacteria at time =0?</u>

Substitute t = 0 in the equation of the particular solution:

         m=10e^{0}\\\\m=10g

3 0
3 years ago
Jayda is running around a track where 3 laps is 5km. She runs 6 laps in 20 min. What is her speed in min per km
zzz [600]

Answer:

2km/m

Step-by-step explanation:

6 laps = 10km

(because 3 x 2 = 6 and double 5km as well)

Distance divide time = speed

20 mins divided by 10km = 2km per minute

3 0
3 years ago
5
Hitman42 [59]

Answer:

Assignment: 01.07 Laboratory TechniquesAssignment: 01.07 Laboratory Techniques

Step-by-step explanation:

Assignment: 01.07 LaboratoryAssignment: 01.07 Laboratory Techniques TechniquesAssignment: 01.07 Laboratory TechniquesAssignment: 01.07 Laboratory Techniques

8 0
2 years ago
Other questions:
  • Question 17 of 26 ashley is making cookies. the recipe calls for three-fourths of a cup of sugar. she needs to make five batches
    8·1 answer
  • The width of rectangle A is the sum of twice a number and 8. The length of the rectangle is 3 times as great as the width. If th
    7·1 answer
  • Greatest common factor of 21,30
    6·2 answers
  • Kim has read 35 pages a book. that is 20% of the total number of pages. how many pages long is kim's book?
    12·1 answer
  • How to solve<br>3|8x|+8=80
    11·1 answer
  • Express the hcf/lcm of 48 and 18 as a linear combination
    8·1 answer
  • A putt putt course offers a deal that when you purchase 10 rounds of golf, you get 1 round for free. if you played a total of 35
    9·2 answers
  • Is 7x+y+3=y a linear equation. also is this in standard form​
    6·1 answer
  • What does 21/8= as a mixed number?
    14·2 answers
  • What is $110 divided in the ratio 7:4?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!