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daser333 [38]
3 years ago
12

Given that 3+√5/4−√5 = a + b√5, find the values of “a” and “b”URGENT PLZ ANSWER!

Mathematics
1 answer:
Vikki [24]3 years ago
6 0

Answer:

Step-by-step explanation:

hello :

√(5/4)= √5/ √4 =√5/2 = (1/2)√5

3+√5/4−√5 = 3+(1/2)√5   so : a=3  and  b= 1/2

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Pls help
KATRIN_1 [288]

Answer:

169.04 in² (nearest hundredth)

Step-by-step explanation:

Surface area of a cone = \pir² + \pirl

(where r = radius of the base and l = slant height)

Given slant height l = 10 and surface area = 188.5

Surface area  = \pir² + \pirl

188.5 = \pir² + 10\pir

\pir² + 10\pir - 188.5 = 0

r = \frac{-10\pi +\sqrt{(10\pi )^2-(4\times\pi \times-188.5)} }{2\pi } = 4.219621117...

Volume of a cone = (1/3)\pir²h

(where r = radius of the base and h = height)

We need to find an expression for h in terms of l using Pythagoras' Theorem a² + b² = c², where a = radius, b = height and c = slant height

r² + h² = l²

h² = l² - r²

h = √(l² - r²)

Therefore, substituting found expression for h:

volume of a cone = (1/3)\pir²√(l² - r²)

Given slant height l = 10 and r = 4.219621117...

volume = 169.0431969... = 169.04 in² (nearest hundredth)

5 0
2 years ago
Read 2 more answers
Xander has a board that is 3 yards long he wants to cut pieces that are 3/4 yard to make shelves How many pieces can he cut​
babymother [125]

Answer:

4 pieces for the shelves

Step-by-step explanation:

3/4×4=3

6 0
3 years ago
Read 2 more answers
F and g are inverse functions.<br> f(n) = -(n + 1)^3<br> g(n) = 3 + n^3<br> a) True<br> b) False
Sophie [7]

Answer:

false

Step-by-step explanation:

hello

if f and g are inverse then (fog)(n)=n

as (fog)(n) is different from n it is false

hope this helps

6 0
2 years ago
HELP ASAPPPP!!! HAUSBJANAHSJISIS
JulijaS [17]
1: 72
2: 32
3: 1/2

I think this is it
6 0
2 years ago
What are the slope and y-intercept of the linear function graphed?
vitfil [10]

Answer:

Its a

Step-by-step explanation:

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2 years ago
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