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d1i1m1o1n [39]
3 years ago
7

Find the common ratio of the geometric sequence 18,-90,450,...

Mathematics
2 answers:
Harlamova29_29 [7]3 years ago
7 0

Answer:

-5

Step-by-step explanation:

The common ratio is what you have to multiply one term by to get the next term.

so:

18 \times r  = -90\\-90 \times r = 450

where r is the common ratio

We can solve these equations:

-90 / 18 = -5

450/-90 = -5

therefore the common ratio is -5

svetlana [45]3 years ago
3 0

Answer:

try looking it up on socratic

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Hi guys please help meee
Lisa [10]
<h3>Answer: 10</h3>

=======================================================

Explanation:

We'll start off converting each mixed number into an improper fraction.

The formula to use is A \frac{b}{c} = \frac{A*c+b}{c}

So,

A \frac{b}{c} = \frac{A*c+b}{c}\\\\2 \frac{1}{8} = \frac{2*8+1}{8}\\\\2 \frac{1}{8} = \frac{16+1}{8}\\\\2 \frac{1}{8} = \frac{17}{8}\\\\

And,

A \frac{b}{c} = \frac{A*c+b}{c}\\\\2 \frac{2}{3} = \frac{2*3+2}{3}\\\\2 \frac{2}{3} = \frac{6+2}{3}\\\\2 \frac{2}{3} = \frac{8}{3}\\\\

So the task of computing 2 \frac{1}{8} \times 2 \frac{2}{3} is exactly the same as computing \frac{17}{8} \times \frac{8}{3}

Notice how we have an 8 up top and an 8 down below. Those 8's cancel out and we're left with \frac{17}{3}. That fraction does not reduce any further.

The last step is to convert that improper fraction result to a mixed number.

\frac{17}{3} = \frac{15+2}{3}\\\\\frac{17}{3} = \frac{15}{3}+\frac{2}{3}\\\\\frac{17}{3} = 5+\frac{2}{3}\\\\\frac{17}{3} = 5 \frac{2}{3}\\\\

Or you could note that 17/3 leads to 5 remainder 2. The 5 is the whole part and the 2 forms the numerator of the fractional part 2/3.

The value is in A \frac{b}{c} form where

  • A = 5
  • b = 2
  • c = 3

Therefore, A+b+c = 5+2+3 = 10

8 0
2 years ago
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Andrea gave 1 widget and received 3; Brian gave 3 widgets and received 13; and Chris forgot how many widgets he gave,
Bess [88]

Answer:

Chris gave 4 and got 28

Dan gave 4 and got 28

this is the best I can do

sorry

6 0
2 years ago
John is driving at a constant speed of 40 miles per hour. How long does it take him to travel 50 miles?
asambeis [7]

Answer:

1 hour and 15 minutes

or

1.25 hr.

Step-by-step explanation:

40 miles ⇒ 1 hr.

50 miles ⇒ total hours

\frac{50}{40} = 1.25 hours

7 0
3 years ago
Read 2 more answers
Translate the sentence into an inequality.<br><br> The sum of 7 and w is greater than 21.<br><br> ?
Alexeev081 [22]

Answer:

7+w \ge 21

remove the line under the arrow

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A number cubed is subtracted from a different number.
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