All categories

3 years ago

What is the common ratio of the sequence? -2, 6, -18, 54,...

2 answers:

hjlf3 years ago

7 0

A1=-2
a2=6
a3=-18

the common ratio musbe negative since the signs alternate

it is multiilied by 3 ach time

comon ratio is -3
an=-2(-3)^(n-1)

Ronch [10]3 years ago

6 0

Answer:

the common ratio is -3

Step-by-step explanation:

You might be interested in

From a fraction to a decimal 19/20

REY [17]

It would be 0.95 you judt divide the top jumberto thebottom one

5 0

3 years ago

Divide 30 in the ratio of 2 : 4

cricket20 [7]

60 because 2:4 is 1/2, and when you divide by a fraction, you multiply by the reciprocal (2/1 instead of 1/2) which would be 60 in this case.

8 0

2 years ago

Your friend claims that it is possible to draw a right triangle where the cosine of either angle (theta) is exactly the same val

avanturin [10]

Answer:

B. No

$Cos \ \theta\neq Cos (90-\theta)\textdegree$

Step-by-step explanation:

-A right angle triangle has two complimentary acute angles and one right angle.

- $\theta$ is usually one of the acute angles and is equivalent to 90º minus it's complimentary acute angle.

-Complimentary angles add up to 90º.

#For complimentary angles:

$Sin \ \theta=Cos \ (90-\theta)\textdegree\\\\Cos \ \theta=Sin(90-\theta)\textdegree\\\\\therefore Cos \ \theta\neq Cos (90-\theta)\textdegree$

The two acute angles cannot have the same Cosine value.

Hence, she's not correct.

5 0

3 years ago

Someone help with this problem and the other ones if you can!!!!

SOVA2 [1]

Answer:

sorry i cant I really need the points tho

8 0

2 years ago

19.5+24+7.5 = 19.5+__+24 = ___+24=___

Rasek [7]

Answer:

7.5, 27, 51

Step-by-step explanation:

19.5 + 24 + 7.5 = 19.5 + 7.5 + 24 = 27 + 24 = 51

5 0

2 years ago

Read 2 more answers