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3 years ago

Help please don’t know this !

Mathematics

2 answers:

Dennis_Churaev [7]3 years ago

7 0

The answer is letter a.

Leto [7]3 years ago

4 0

Answer:

Step-by-step explanation:

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Prove that the (n+1) term of a G.P of which the first term is a and third term is b,is equal to the (2n+1) term of a G.P of whic

Ahat [919]

Hello,

$u_{1} =a\\
 u_{3} =b\\

q= (\dfrac { u_{3} } {u_{1 } } )^ \frac{1}{2} \\\\\\

=(\dfrac{b}{a}) ^ \frac{1}{2} \\




 u_{n+1} =a*q^{n}=a* (\dfrac{b}{a}) ^ \dfrac{n}{2} \\


 \\\\\\\\\\\\v_{1} =a\\
 v_{5} =b\\

r= (\dfrac { v_{5} } {v_{1 } } )^ \frac{1}{4} \\\\\\


 v_{2n+1} =a*r^{2n}\\\\
=a* (\dfrac{b}{a}) ^ \dfrac{2n}{4}\\\\


=a* (\dfrac{b}{a}) ^ \dfrac{n}{2} \\





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3 0

2 years ago

Find sin angle∠ A. A. 3/5 B. 4/5 C. 1 D. 5/4

Rzqust [24]

Answer:

The answer is B.

Step-by-step explanation:

Recall SohCahToa, where $sin(A)=opp/hyp$ .

The opposite side (to angle A) here is 8, while the hypotenuse is 10.

Thus, we have:

$sin(A)=8/10=4/5$

The correct answer is B.

8 0

2 years ago

What is the length of the missing leg? If necessary, round to the nearest tenth.

KengaRu [80]

Answer:

a = 3.5

Step-by-step explanation:

Let's find 'a' using Pythagoras theorem.

=> 4² = 2² + a²
=> 16 = 4 + a²
=> 12 = a²
=> a = √12
=> a = √2 x 2 x 3
=> a = 2√3
=> a = 2 x √3
=> a = 2 x 1.732
=> a = 3.464 = 3.5 (Estimated)

Hoped this helped.

$BrainiacUser1357$

4 0

1 year ago

Helppp plz asappp

Lesechka [4]

Answer:

B. $0.27

Step-by-step explanation:

3 0

2 years ago

It takes Bert 30 minutes longer to mow a rectangular lawn that measures 30 feet by 25 feet than it takes him to mow a rectangula

nevsk [136]

Answer:

C: 70 Mins

Step-by-step explanation:

1, 20ft*15ft=300ft^2

2, 30ft*25ft=750ft^2

3, 750ft-350ft=450ft^2

4, 450 ft^2 = 30 mins

5, 350ft=750ft=1050ft^2

6, 1050/450=2.3333

7, 30*2.3333=70

8, 70 mins

4 0

2 years ago