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3 years ago

PLEASE HELP: Find the sum of the first 8 terms in the geometric sequence: 1, 3, 9, 27, ...

Mathematics

1 answer:

nikklg [1K]3 years ago

6 0

Answer:

3,280

Step-by-step explanation:

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4b-4=3 b+3 What’s b=

julia-pushkina [17]

Answer:

b = 7

Step-by-step explanation:

4b - 4 = 3b + 3

4b - 3b = 3 + 4

b = 7

7 0

3 years ago

Read 2 more answers

Nora's paper airplane flew 9 1/6 feet. That was 2 3/4 feet farther than Max's plane flew. Write and solve an equation to show ho

stepan [7]

Answer:

Max's paper airplane flew $\frac{77}{12}$ feet or $6\frac{5}{12}$ feet.

Step-by-step explanation:

As Nora's paper airplane flew 9 1/6 feet

i.e.

$9\frac{1}{6}=\frac{55}{6}$

Nora's paper was farther than Max's plane flew by = 2 3/4 feet

i.e.

$2\frac{3}{4}=\frac{11}{4}$

Thus the equation to show how far Max's paper airplane flew is:

$\:\:9\frac{1}{6}-2\frac{3}{4}$

$=\frac{55}{6}-\frac{11}{4}$

$\mathrm{Least\:Common\:Multiplier\:of\:}6,\:4:\quad 12$

$\mathrm{Adjust\:Fractions\:based\:on\:the\:LCM}$

$=\frac{110}{12}-\frac{33}{12}$

$\mathrm{Since\:the\:denominators\:are\:equal,\:combine\:the\:fractions}:\quad \frac{a}{c}\pm \frac{b}{c}=\frac{a\pm \:b}{c}$

$=\frac{110-33}{12}$

$\mathrm{Subtract\:the\:numbers:}\:110-33=77$

$=\frac{77}{12}$

$=6\frac{5}{12}$

Therefore, Max's paper airplane flew $\frac{77}{12}$ feet or $6\frac{5}{12}$ feet.

6 0

3 years ago

-x^2=-36 I need help

Gennadij [26K]

You need to first make everything positive:
x^2=36
Then you need to get the square root of each side:
x=6 or -6

Hope this helps :)

4 0

3 years ago

Rico thinks it's a perfect square triinomiall. Teresa says it's the difference of two squares. Who is

Naya [18.7K]

Answer: Rico is right.

(-1)(3x + 5)²

Step-by-step explanation: If it were the difference of two squares, the -30x would not be there.

It makes sense to factor out (-1) fry the trinomial, leaving all positive terms.

Then factor 9x² + 30x + 25 as

(3x + 5)²

7 0

3 years ago

29 les the product of 3 and x

yanalaym [24]

Answer:

Step-by-step explanation:

3 0

3 years ago