3 years ago

EMERGENCY PLEASE HELP REALLY HARD!

1 answer:

8 0

Geometric sequence nth term:
tₙ = t₁ · (r)ⁿ⁻¹

t₁ = -2
t₄ = 128 (4th term)

formula for 4th term:

t₄ = -2 · (r)⁴⁻¹ = -2· (r)³

since t₄ = 128

128 = -2(r)³
(r)³ = -64
r = ∛-64
r = -4

so second term is
t₂ = -2· (-4)²⁻¹ = 8

third term is
t₃ = -2 · (-4)³⁻¹ = -32

You might be interested in

1/4 + 1/3= {Khan Academy btw}

zmey [24]

Answer: $\frac{7}{12}$

Step-by-step explanation:

$\frac{1}{4} +\frac{1}{3}=\frac{(1)(3)+(4)(1)}{(4)(3)} =\frac{3+4}{12} =\frac{7}{12}$

5 0

3 years ago

What kind of line is being constructed in this series of diagrams?

wolverine [178]

The line that is being constructed in the series of diagrams provided is perpendicular.

6 0

3 years ago

Read 2 more answers

A classroom has 2 bookcases that weigh 117 pounds altogether. If they all weigh the same amount, how much does each bookcase wei

Lapatulllka [165]

Answer:

58.5 pounds each.

Step-by-step explanation:

If two bookcases weigh 117 pounds and each weighs the same amount, each bookcase must weigh half of the total weight. 117/2 equals 58.5.

6 0

3 years ago

Read 2 more answers

#2 only <br> And it's to confusing

ipn [44]

They are easy to compare if they all have the same common denominator, then you can easily order them by the magnitude of the numerators...

85/10, -67/10, -56/10, 82/10 so now they are easy to compare...so

-6.7, -28/5, 8.2, 17/2

5 0

3 years ago

3 + x + 1 = 2<br><br> Thank you :)

Lina20 [59]

Answer:

x = -2

Step-by-step explanation:

Please mark Brainliest when able, for showing work.

8 0

3 years ago