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3 years ago

Plz help what is 5(4• 2/7)

Mathematics

1 answer:

postnew [5]3 years ago

5 0

4*2/7=8/7 and 8/7*5=40/7 so correct answer is 40/7

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A recursive rule for a geometric sequence is a1=2; an= 4/9 an-1

Oxana [17]

A recursive rule for a geometric sequence:

$a_1\\\\a_n=r\cdot a_{n-1}$

---------------------------------------------------

$a_1=2;\ a_n=\dfrac{4}{9}a_{n-1}\to r=\dfrac{4}{9}$

---------------------------------------------------

The exciplit rule:

$a_n=a_1r^{n-1}$

Substitute:

$a_n=2\left(\dfrac{4}{9}\right)^{n-1}=2\cdot\left(\dfrac{4}{9}\right)^n\cdot\left(\dfrac{4}{9}\right)^{-1}=2\cdot\left(\dfrac{4}{9}\right)^n\cdot\dfrac{9}{4}\\\\\boxed{a_n=\dfrac{9}{2}\cdot\left(\dfrac{4}{9}\right)^n}$

3 0

3 years ago

F(x)= sqrt of 5x+7 and g(x)= the sqrt of 5x-7

ki77a [65]

F(x) = √(5x + 7)

g(x) = √(5x - 7)

(f + g)(x) = f(x) + g(x)

(f + g)(x) = √(5x + 7) + √(5x - 7)

Answer: C)

4 0

3 years ago

Please answer this correctly

valkas [14]

Answer:

all of them are valid solutions

Step-by-step explanation:

So we plug in values of t below and get:

18 is < 107

54 is < 107

36 is < 107

27 is <107

7 0

3 years ago

If JM = 5x – 8 and LM = 2x – 6, which expression represents JL?

muminat

Answer:

The expression represents JL is<u> 3x - 2</u>.

Step-by-step explanation:

Given:

JM = 5x – 8 and LM = 2x – 6.

Now, to find expression represents JL.

JM = JL + LM

<em>Subtracting both sides by LM we get:</em>

JM - LM = JL.

JL = JM - LM

Now, putting the expression to get JL:

$JL=5x-8-(2x-6)$

$JL=5x-8-2x+6$

$JL=3x-2.$

Therefore, the expression represents JL is 3x - 2.

8 0

3 years ago

Oh lord help :,) please and thank you

ziro4ka [17]

Answer:

The answer is 19.10 $

Step-by-step explanation:

5 0

3 years ago

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