Step-by-step explanation:
4x - 2 = -14
4x = -12
x = -3.
Answer:
Triangle+ 83.25
Square/ Rectangle = 166.5
Step-by-step explanation:
I need the shape specified
The sequence is, in fact, quadratic. It is described by the equation
.. a[n] = (n*(n -1))/2 +2
First differences are increasing, so the sequence will not be arithmetic. An arithmetic sequence has constant first differences.
Second differences are constant, so the sequence will not be geometric. A geometric sequence will have first-, second-, third-differences, and those to any level, that have the same constant ratio as the terms of the original sequence.
She pays in total $1350 after the 12 months
Step-by-step explanation:
The given is:
1. Daniela borrowed some money from her parents she agreed to pay
$30 at the end of the first month
2. She agreed to pay $15 more each additional month for months
We need to find how much money she pays in total after the 12 months
The formula of the sum of n terms of an arithmetic series is
, where a is the 1st term, d is the
common difference between each two consecutive terms, and n the
position of the term
∵ She will pay $30 at the end of the first month
∴ a = 30
∵ She will pay $15 more each month
∴ d = 15
∵ She will do that for 12 months
∴ n = 12
Substitute these values in the formula of the sum above
∴
∴
∴
∴
∴
She pays in total $1350 after the 12 months
Learn more:
You can learn more about arithmetic sequence in brainly.com/question/7221312
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