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Shtirlitz [24]
3 years ago
6

Which answer describe the type of sequence? 3,9,15,21

Mathematics
1 answer:
Alenkinab [10]3 years ago
5 0

Answer:

The sequence is arithmetic

we know that

In an arithmetic sequence, the difference between consecutive terms is always the same and is called common difference

In this problem we have

3,9,15,21,...

Let

a1=3, a2=9,a3=15,a4=21

a4-a3=21-15=6

a3-a2=15-9=6

a2-a1=9-3=6

The sequence is arithmetic

The common difference is equal to

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Evaluate : 9⁴xa⁷b⁴/ 3⁵xa⁴b⁴ ​
hjlf

Answer:

27a³

Step-by-step explanation:

9⁴xa⁷b⁴ / 3⁵xa⁴b⁴

(3²)⁴xa⁷b⁴ / 3⁵xa⁴b⁴

3⁸xa⁷b⁴ / 3⁵xa⁴b⁴

3³a³

27a³

7 0
3 years ago
In monitoring lead in the air after the explosion at the battery factory, it is found that the amounts of lead over a 6 day peri
liubo4ka [24]

Answer:

The margin of error that corresponds to a 95% confidence interval is 4.96.

Step-by-step explanation:

We have the standard error(which is the same as the standard deviation of the sample), so we use the students t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. There are 6 days, so

df = 6 - 1 = 5

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 35 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975([tex]t_{0.975}). So we have T = 2.5706

The margin of error is:

M = T*s = 2.5706*1.93 = 4.96

The margin of error that corresponds to a 95% confidence interval is 4.96.

3 0
3 years ago
Which is greater 11/16 or 3/4
Anettt [7]
To compare fractions, we need to have the same denominator
The least common multiple is 16
\frac{11}{16} 
to change \frac{3}{4}, we should multiply the numerator and denominator by 4
\frac{3*4}{4*4} = \frac{12}{16}

\frac{11}{16} < \frac{12}{16}

so basically, \frac{12}{16} is greater than \frac{11}{16}
which means \frac{3}{4} is greater

\frac{3}{4} is greater
6 0
3 years ago
The original price of a computer game is 45$ The price is marked down by 18$ what percent of the original price is the markdown?
OLga [1]

Answer:

$27

Step-by-step explanation:

$45 - $18 = $27

Percentage 150% (27 divided by 18 = 1.5, shift the decimal right two times and add the zero at the end which gives you 150%)

4 0
2 years ago
Tim installs 50 square feet of his floor in 45 minutes. At this rate, how long does it take him to install 495 square feet? (Ple
Alenkinab [10]

Answer:

445.5min=595²ft

Step-by-step explanation:

y=0.9x

y=0.9*495

y=445.5

5 0
3 years ago
Read 2 more answers
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