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
VARVARA [1.3K]
2 years ago
8

Find the value of a' and 'b' if 2/ 7+3√5 =a-b√5​

Mathematics
2 answers:
Whitepunk [10]2 years ago
4 0

Answer:

a=\frac{7}{2} \  \  ,\  \  \  b=\frac{3}{2}

Step-by-step explanation:

\frac{2}{7+3\sqrt{5} } =\frac{2\times \left( 7-3\sqrt{5} \right)  }{\left( 7+3\sqrt{5} \right)  \left( 7-3\sqrt{5} \right)  }

         =\frac{2\times \left( 7-3\sqrt{5} \right)  }{7^{2}-\left( 3\sqrt{5} \right)^2  }

         =\frac{2\times \left( 7-3\sqrt{5} \right)  }{49-45  }

         =\frac{2\times \left( 7-3\sqrt{5} \right)  }{4  }

         =\frac{7-3\sqrt{5} }{2  }

         =\frac{7}{2} -\frac{3}{2} \sqrt{5}

Then

a = 7/2

b = 3/2

ycow [4]2 years ago
3 0

Step-by-step explanation:

Grazie don't forget to follow narin po

You might be interested in
Offering 20 Points(not a lot I know but I really need quick help)!!!
myrzilka [38]

Answer:

Correct arrangement of equation of displacement to find a is as follows;

1-  Vt - d = 1/2 a t^2 (^ represents exponent i.e. t square as given in equation)

2- 2(Vt - d ) = a t^2

3- a = 2(Vt - d )/ t^2   (keep in mind, 2(Vt - d) whole divided by  t^2)

Step-by-step explanation:

1-  In the first equation, Vt is taken to the left side of the equation (keep in mind, original equation of displacement used for reference as given in question) and multiplied by -1 on the both sides of the equation.

2- In the second equation, 2 is multiplied on the both sides.

3- Multiply t^2 on both sides of the equation, We will get a in correct arrangement, which is required to find.

5 0
3 years ago
Carmelo farms a tract of land that typically yields 64.9 kilograms of corn. A fertilizer manufacturer claims that its fertilizer
muminat

Answer: 107.09 kilograms

Step-by-step explanation:

64.9 + 65% of 64.9

64.9 + (0.65 * 64.9)

64.9 + 42.19

7 0
3 years ago
Round 8,624 to the nearest thousand
Shtirlitz [24]

8,624 rounded to the nearest thousand is 9,000

Hope this helps

-AaronWiseIsBae

8 0
3 years ago
Read 2 more answers
Factorise: a squared +8a -20
Vaselesa [24]
Factor out the 4 in both equations
8a^2-20^2=(2^2 times a^2 times 2)-(2^2 times 5)
therefor it is also equal to
(2a)^2 times 2-(2^2 times 5)
we can force it into a difference of 2 perfect squares which is a^2-b^2=(a-b)(a+b)
(2a√2)^2-(2√5)^2=((2a√2)-(2√5))((2a√2)+(2√5))


8 0
3 years ago
Find DY divided by DX by implicit differentiation y=sinxy 
amm1812

Answer:

Step-by-step explanation:

y = sin(xy)\\\frac{d}{dx}y=cos(xy)(\frac{d}{dx}(xy))\\  \frac{d}{dx}y = cos(xy)(y + x*\frac{d}{dx}y)\\ write \: \frac{d}{dx}y \: as\:y'\\y' = cos(xy)(y+xy')\\y' = ycos(xy) + xy'cos(xy) \\y'-xy'cos(xy) = ycos(xy)\\y'(1-xcos(xy)) = ycos(xy)\\\\y' = \frac{ycos(xy)}{1-xcos(xy)}

6 0
3 years ago
Other questions:
  • F(n)=2n+4 g(n) = 4n - 2 Find f (g(2))
    5·1 answer
  • 28 members and 50% decrease
    11·2 answers
  • Select the correct answer.
    8·1 answer
  • What is equivalent to ^3 square root 8^x
    8·1 answer
  • Tonya knows a half a gallon of juice at the store cost $2.29. She decided to to buy 10gallons of juices for a party. how much mo
    10·1 answer
  • So I have 4 math problems, whether you choose to answer them or not is your choice. Also thank you if you do answer them. :)
    14·1 answer
  • Is this table proportional or non-proportional? Explain your reasoning to why this table is proportional or non-proportional.
    5·1 answer
  • Which ordered pair is in the solution set of y> 2x + 3?
    8·2 answers
  • How to solve <br>(a-3)4​
    9·2 answers
  • What is the slope of a perpendicular line to 3.2 + 4y = 9?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!