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2 years ago

Find the 9th partial sum of the geometric sequence an=43n–1.

Mathematics

1 answer:

siniylev [52]2 years ago

7 0

Answer:

39364.

Step-by-step explanation:

I guess its an = 4*(3)^(n-1)

r = 3, a1 = 4 and n = 9

Sum of n terms = a1 * (r^n - 1) / (r - 1)

so S9 = 4 *(3^9 - 1) / (3 - 1)

= 4 * (19683 - 1) / 2

= 78728/2

= 39364.

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I need help with this ASAP plzzzzz

miss Akunina [59]

Answer:

23. $\frac{4\sqrt{3} }{3}$

24. $\frac{7\sqrt{3}}{3}$

25. $6\sqrt{3}$

26. $\frac{10\sqrt{3} }{3}$

27. $14$

28. $4\sqrt{3}$

Step-by-step explanation:

To solve these i used SOHCAHTOA

$sin=\frac{opposite}{adjacent}\\ cos=\frac{adjacent}{hypotenuse} \\tan=\frac{opposite}{adjacent}$

23.

Find the missing side using Tangent

$tan(30)=\frac{x}{4}$

$4*tan(30)=x$

$\frac{4\sqrt{3} }{3}$

24.

Find the missing side using Tangent

$tan(30)=\frac{x}{7}$

$7*tan(30)=x$

$\frac{7\sqrt{3}}{3}$

25.

Find the missing side using Tangent

$tan(30)=\frac{x}{18}$

$18*tan(30)=x$

$6\sqrt{3}$

26.

Find the missing side using Tangent

$tan(30)=\frac{x}{10}$

$10*tan(30)=x$

$\frac{10\sqrt{3} }{3}$

27.

Find the missing side using Tangent

$tan(30)=\frac{x}{14\sqrt{3} }$

$(14\sqrt{3}) *tan(30)=x$

$14$

28.

Find the missing side using Tangent

$tan(30)=\frac{x}{12}$

$12*tan(30)=x$

$4\sqrt{3}$

5 0

3 years ago

Frank exercises no less than 40 minutes per day use t to represent Frank's amount of exercise minutes per day.

BabaBlast [244]

9514 1404 393

Answer:

t ≥ 40

Step-by-step explanation:

"No less than" is the same as "greater than or equal to".

t ≥ 40

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2 years ago

It costs $2.75 to enter an arcade. Each game costs $1.25. You have $14. How many games can you play?

Greeley [361]

Answer:

9 times

Step-by-step explanation:

first you do 14 - 2.75 which equals 11.25. you divide that number by 1.25 which equals 9 in total, getting you your answer

7 0

2 years ago

Read 2 more answers

If z = 38 and x = 110, then what is the value of y?

sladkih [1.3K]

Answer:

First I need the whole question and second I am guessing around 76 or 72.

Step-by-step explanation:

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2 years ago

) For a company picnic, Robert ordered a box of fresh-baked gingerbread cookies and

Tasya [4]

Answer:

30 gingerbread cookies.

Step-by-step explanation:

100 x 0.3 = 30

8 0

2 years ago