Using order of operations PEMDAS you first multiply 5 * 2 to get 10 then divide 10 by 70 to get rougly 0.14 and then subtract it by 8 to get -7.86 roughly. <span />

5 0

3 years ago

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1.2,3,7.5,18.75, which formula can be used to describe the sequence

elena-14-01-66 [18.8K]

Answer:

$a_{n}=1.2 \times(2.5)^{n-1}$

Step-by-step explanation:

If we observe the given sequence, we find that the ratio of two consecutive terms is the same. i.e.

$\frac{3}{1.2}=2.5\\\\\frac{7.5}{3}=2.5\\\\ \frac{18.75}{7.5}=2.5$

Such a sequence in which the ratio of consecutive terms remain the same is know as Geometric Sequence. Following formula is used to represent a Geometric Sequence:

$a_{n}=a_{1}\times(r)^{n-1}$

Here:

$a_{n}$ is the general term. Using the value of n =1,2,3 ... will give us the term of the sequence.

$a_{1}$ is the first term which is 1.2 in this case.

r represents the common ratio which is 2.5.

Using these values we get:

$a_{n}=1.2 \times(2.5)^{n-1}$

This formula can be used to represent the given sequence.

3 0

4 years ago

Absolute value of 4x +3 =3

sashaice [31]

X=0 (4×0)+3=3 that I think is the absolute value

8 0

3 years ago

A polling company has been hired to determine the approval rating for a local member of Congress. The company completed the poll

Gnoma [55]

Answer:

The answer is B. The sample was biased because the survey was only given to a select group (the males). An unbiased sample would be a large group of random people (all genders included).

3 0

3 years ago