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3 years ago

11

X^3-10x^2+24x=0 solve using Quadratic

1 answer:

Kitty [74]3 years ago

3 0

Not my working but it works ahah

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What is the term of a 7-term geometric series if the first term is -11 the last term is -45,056 and the common ratio is -4

shutvik [7]

I assume you mean to ask how to find the sum of the seven terms?

You have

$a_2=ra_1$
$a_3=ra_2=r^2a_1$
$a_4=ra_3=r^3a_1$
...
$a_7=ra_6=r^6a_1$

So the sum is

$a_1+ra_1+r^2a_1+\cdots+r^6a_1=a_1(1+r+r^2+\cdots+r^6)=a_1\times\dfrac{1-r^7}{1-r}$

You know that $a_1=-11$ and $r=-4$ , so the sum is equal to

$-4\times\dfrac{1-(-4)^7}{1-(-4)}=-13108$

8 0

3 years ago

Solve the equation

NNADVOKAT [17]

Answer:

<em>x = 0.04979</em>

Step-by-step explanation:

ln x = -3

x = e^(-3)

x = 1/e^3

x = 0.04979

8 0

3 years ago

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Jason wants to buy a game that cost $20. He earns $2 every time he washes the

Reika [66]

Answer:

7

Step-by-step explanation:

10 x 2 = 20

10 - 3 = 6

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3 years ago

Help i dont know the formula for the triangle to find the answer its surface area n volume

777dan777 [17]

Answer:

#4=10.5

#5=48

Step-by-step explanation:

The formula for the triangle for area is 1/2 time base times hight

The forumale fot the triangle for volume is 1/2 time base times hight

So for number #4 it will be 1/2 x 3 x 7

and number #5, it will be 1/2 x 8 x 12

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3 years ago

Which is an equation in point-slope form for the given point and slope?

OLga [1]

Y--7=-2/3(x-1)
y+7=-2/3(x-1)

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3 years ago

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