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
AfilCa [17]
3 years ago
9

Is 12 and 15 relatively prime

Mathematics
1 answer:
Dovator [93]3 years ago
7 0
12 and 15 aren't relatively prime because they have 3 as a common factor. However, if it had only 1 as it's common factor then it would be relatively prime but 12 and 15 do have another common factor besides 1.
You might be interested in
The diameter of each wheel of a bicycle is 27 inches. If you are traveling at a speed of 20 miles per hour on this bicycle, thro
klasskru [66]
Notice, you've got a diameter in inches
and a linear velocity in miles
thus, you'd need to convert first

\bf v=rw\implies \cfrac{v}{r}=w\qquad 
\begin{cases}
v=\textit{linear speed}\\
r=radius\\
w=\textit{angular speed}\\
 --------------\\
v=20\frac{mi}{h}\\
r=\frac{diameter}{2}=\frac{27}{2}
\end{cases}
\\\\
\textit{now, converting 20miles to inches}
\\\\
\cfrac{20mi}{h}\cdot \cfrac{5280ft}{mi}\cdot \cfrac{12in}{ft}\implies \cfrac{20\cdot 5280\cdot 12\ in}{h}\impliedby v
\\\\\\
\cfrac{1267200\frac{in}{h}}{\frac{27}{2}in}=w

now, whatever that is, you'll need to divide it by a revolution, recall, a revolution is 2\pi
thus \bf \cfrac{\qquad \boxed{\cfrac{1267200\frac{in}{h}}{\frac{27}{2}in}}\qquad }{2\pi }=revolutions
7 0
3 years ago
Read 2 more answers
Mr. william phisics class lasts 7/8 of an hour, 3/10 is used on arming up . How many minutes do they take to warm up..NOT FRACTI
pychu [463]
7/8
3/10 of 7/8 means 3/10 times 7/8=21/80

1hour=60mins
60 times 21/80=1260/80=15.75

answer is 15.75 mins
5 0
3 years ago
Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth.
DaniilM [7]
A ) h = -16 t² + 135 t + 76
Let : h = 0
0 = - 16 t² + 135 t + 76
B ) t 1/2 = (-b+/- √ ( b² - 4 ac ) / ( 2 a )
t 1/2 = (-135 - √(18,225 + 4,864))/ (-32) = ( - 135 - 151.95) / (- 32)=
= (-286.95) / (- 32) = 9.967 ≈ 9.0 s ( other solution is negative )
Answer:
2)  0 = -16 t² + 135 t + 76;  9 s 

7 0
4 years ago
Read 2 more answers
Round each number to the nearest ten thousand and then subtracting
katrin [286]

Answer:

43,000

Step-by-step explanation:

7 0
4 years ago
A chemical company makes two brands of antifreeze. The first brand is 55 % pure antifreeze, and the second brand is 80 % pure an
Likurg_2 [28]

We have 55% and 80% antifreeze.  We need 90 gallons of 75%.  

F - 55% and E - 80%

A) F + E = 90

B) .55 F + .80 E = 67.50 (which is .75 * 90)  Multiplying A) by -.55

A) -.55 F -.55 E = -49.50 (which is -.55 * 90) then adding A) & B)

.25 E = 18

E = 72 gallons of 80% and

F = 18 gallons of 55%

********* DOUBLE CHECK ******************

72 * .80 = 57.60  and 18 * .55 = 9.90

57.60 + 9.90 = 67.50 gallons of antifreeze and we have 90 total gallons

(67.50 / 90) * 100 = 75% correct!

Source: 1728.com/mixture.htm


3 0
4 years ago
Other questions:
  • I want to know the equation of the line
    6·1 answer
  • if michelle rollerblade around a circular track with a radius of 80 meters, how far does she skate? use 3,14 for pie. round to t
    14·1 answer
  • Zack had a grade of 90% on his geography test. If there were 70 points possible on the
    12·2 answers
  • A = w + 5
    11·1 answer
  • Suppose the sales tax rate in your area is 7.5%. Complete the explanation of how to determine the total cost, including tax, of
    8·2 answers
  • A system of linear equations includes the line that is created by the equation y = 0.5 x minus 1 and the line through the points
    15·2 answers
  • Find the measures of the interior angles.
    15·2 answers
  • Sin 40 cos 50 + cos 40 sin 50 find the value​
    7·1 answer
  • A function is represented by the graph.
    13·2 answers
  • Angle sum theorem ??
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!