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Ulleksa [173]
3 years ago
12

The sum of the first 6 terms of a geometric series is 15,624 and the common ratio is 5 what is the first term of the serious?

Mathematics
1 answer:
kap26 [50]3 years ago
5 0

Answer:

first term = 4

Step-by-step explanation:

Sₙ = (a₁ * (1 - rⁿ)) / (1 - r)     a₁: first term     r: common ratio     n: terms

15624 = (a₁ * (1 - 5⁶)) / (1 - 5)

          = (a₁ * -15624) / -4

a₁ x (-15624) =15624 x (-4)

a₁ = 4

check: 4+20+100+500+2500+12500 =15624

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PRACTICE ANOTHER A normal distribution has a mean of 69 and a standard deviation of 15. What is the median
aliya0001 [1]

Answer:

69

Step-by-step explanation:

Here, we are interested in getting the median of the distribution

Mathematically, if we are talking about a moral distribution, we have equal values for median, mode and mean

Hence the median in this case will be 69

6 0
3 years ago
If the volume of a cuboid is 120 cm' and it has a length of 10cm, a height of 4cm, the width of the cuboid is ?
Misha Larkins [42]

Answer:

3cm

Step-by-step explanation:

V = L * W * H

V = 10 * W * 4

10 * 4 = 40

120 / 40 = 3

W = 3

6 0
2 years ago
HELP PLEASE!!What method can you use to find the area of the composite figure. Check ALL that apply.
GenaCL600 [577]

Answer:

C

Step-by-step explanation:

The reason we can use this method is because we are given a composite figure with a house shape with one triangle on top. We can use the guidance of the dotted lines to make out that a rectangle can be used to find the figure. We can see that apart from the figure, there are two congruent triangles. To find the area we would do -

First find the missing height of the smaller triangles. We would use the pythagorean theorem to find that the missing height is√5

We could do 8(4) = 32 to find the area of the rectangle.

Then, we could do 2√5/2 to find one missing triangle. We could then add the triangles to find the measures of the combined triangles as 2√5. Then, we could do 32 - 2√5 to find the area as 27.5.

Hope this helps :)

8 0
3 years ago
1/2*x=3/4(x-2) what is the answer?
STALIN [3.7K]

Answer:

x=6

Step-by-step explanation:

1/2x=3/4(x-2)

1/2x=3/4x-1.5      (distribute)

+1.5    +1.5

1/2x+1.5=3/4x

-1/2x     -1/2x

1.5=1/4x

6=x

hope this helps

brainliest?

8 0
4 years ago
2. Alejandro goes to Europe for a holiday. He changes 500 pesos into euros at an
Solnce55 [7]

Answer:

512.82 euros

Step-by-step explanation:

1/.975=x/500

500*1/.975=x

x=512.82

6 0
3 years ago
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