4 years ago

HALP me please, mathematics

Mathematics

1 answer:

malfutka [58]4 years ago

3 0

X=7 (let me know if you would like to know how I got the answer)

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What is the sum of the geometric sequence −4, 24, −144, ... if there are 8 terms?

Helga [31]

Answer:

The sum of 8 geometric sequence is 959780

Step-by-step explanation:

We are given

this sequence is geometric

-4 , 24 , -144

First term is -4

so, $a_1=-4$

now, we can find common ratio

$r=\frac{24}{-4}=-6$

we can use formula

$S_n=a_1(\frac{1-r^n}{1-r} )$

n=8

now, we can plug values

$S_8=-4(\frac{1-(-6)^{8}}{1+6} )$

now, we can simplify it

and we get

$S_8=959780$

4 0

4 years ago

Points A (3,8) and B (-4,8 are located on a cooridinate plane. Find the distance between them.

aleksandrvk [35]

-4 + 3 = 7
8=8
(7,0) = DISTANCE BETWEEN THEM

7 0

3 years ago

If you get both of these questions right I will give you 50 points

Stella [2.4K]

Answer:

1) c 226

1. E

2. D

3. B

4. A

5. C

Step-by-step explanation:

6^3=216

5x(4-2)

5x2=10

216+10=226

8 0

3 years ago

I need help! I don't know how to get the answer or what it is. Can anyone help me it's for a test and I'm on my last attempt?

Greeley [361]

Answer:

See explanation

Step-by-step explanation:

(4)

Using the sine ratio in the right triangle

sinΘ = $\frac{opposite}{hypotenuse}$ = $\frac{7}{9}$ , thus

Θ = $sin^{-1}$ ( $\frac{7}{9}$ ) ≈ 51.1°

(5)

Using the tangent ratio in the right triangle

tanΘ = $\frac{opposite}{adjacent}$ = $\frac{4}{5}$ , thus

Θ = $tan^{-1}$ ( $\frac{4}{5}$ ) ≈ 38.7°

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3 years ago

Select the correct answer from each drop-down menu. The given equation has been solved in the table. Step Statement 1 2 3 4 5 Us

stiks02 [169]

Answer:

Is there a picture or something?

6 0

2 years ago