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
arlik [135]
3 years ago
11

You need to solve for X

Mathematics
1 answer:
zhenek [66]3 years ago
5 0

Look at the picture.

We have the proportion:

\dfrac{x}{2}=\dfrac{305}{122}\ \ \ \ |\cdot2\\\\x=\dfrac{305}{61}\\\\x=5\ ft

Answer: Rayan is 5 ft tall.

You might be interested in
What if i want my own room but there are six kids and only three rooms then what do i do
ANEK [815]

Answer:

put all the kids in a room with the parents and have the other room to yourself

Step-by-step explanation:

6 0
3 years ago
You pay $40 each month for satellite TV, plus $3.50 for every movie you purchase. Write and solve an equation to find the number
IRINA_888 [86]

Answer:3.50x+40=57.50

They bought 5 movies

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
What is the surface area of the right cylinder with a height of 20 and a radius of 5
Alex17521 [72]

Answer: The answer is 785.4

Step-by-step explanation: Equation is 2πrh+2πr²

Plug in your numbers and hit enter!

Hope this helps

3 0
3 years ago
Read 2 more answers
Newton's law of cooling states that the temperature of an object changes at a rate proportional to the difference between its te
Aleonysh [2.5K]

Answer:

t=5.18 minute

Step-by-step explanation:

Using Newton's law of cooling

\frac{dT}{dt}=-k(T-T_{s})

T is temperature of a cup of coffee at any time t T_{s}, is the temperature of the surrounding and k is a constant of proportionality in this negative because temperature is decreasing.

T(0)=190\\T(1)=170\\T_{s}=66

\frac{dT}{dt}=-k(T-T_{s})\\\frac{dT}{(T-T_{s})}=-k*dt\\\int\limits {\frac{1}{T-T_{s} } } \, dT=-\int\limits {k} \, dt\\ln(T-T_{s})=k*t+C\\e*ln(T-T_{s})=e^{k*t+C} \\T-T_{s}=e^{k*t}*e^{C}\\e^{C}=C\\T-T_{s}=e^{k*t}*C\\T=T_{s}+e^{k*t}*C

To find constant knowing the time and the temperature the first step of the change of energy in cup of coffee

T=T_{s} +e^{-k*t}*C\\ C=190-66=124\\170=66+124*e^{-k*2}\\ 170-66=124*e^{-k*2}\\ln(\frac{104}{124})=ln*e^{-k*2}\\-0.175=-k*2\\k=0.08794

Now using the constant of decreasing can find the time to be a 145 temperature the cup of coffee

145=66+124*e^{-k*t} \\145-66=124*^{-0.087*t}

ln(0.637)=ln*e(-0.087*t)\\-0.45=-0.087*t\\t=5.18minutes

4 0
3 years ago
Which statements are true?
Nimfa-mama [501]
All rectangles are parallelograms. Hope this helps.
4 0
3 years ago
Read 2 more answers
Other questions:
  • Joel bought 8 books. Some books cost $13 each and some cost $17 each. In all, he spent $128. Which system of linear equations re
    5·1 answer
  • Identify the variation as direct, inverse, joint or combined.<br> y = 7x
    12·2 answers
  • Catherine has $54. She plans to spend more than $20 of the money for a painting canvas. The rest will go toward paints. Each tub
    12·2 answers
  • I need help with my ADD and subtraction fraction ​
    13·1 answer
  • Graph the line that represents a proportional relationship between y and x where the unit rate of change of y with respect to x
    11·1 answer
  • Freddy fazbear sells pizza slices that are 1/8 of a pizza pie for $1.50 each.A soda is sold for $1.25. If he sells 32 slices of
    9·1 answer
  • This is not a graded question
    6·1 answer
  • Find the geometric mean of 24 and 45​
    7·1 answer
  • Anyone know the answer will give brainliest if correct.
    9·2 answers
  • Please please help with these two !!! i’ll give brainliest pls
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!