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alexdok [17]
2 years ago
8

Help please, thanks.

Mathematics
1 answer:
nataly862011 [7]2 years ago
8 0
The correct answer is B
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Find the sum of the first 12 terms of the sequence. 1, -4, -9, -14, . . . (2 points)
egoroff_w [7]

Answer:

sum of the first 12 terms of the sequence. 1, -4, -9, -14, . . = -318

Step-by-step explanation:

The given AP is,

1, -4, -9, -14, . . .

first term a = 1,

common difference d = -4 - 1 = -5

number of terms  n = 12

<u>Equation:</u>

Sum of n terms of AP, S₁₂ = n/2[2a + (n - 1)d]

S₁₂ = 12/2[(2*1) + (12 - 1)*(-5)]

S₁₂ = 6[2 + (11*(-5))]

S₁₂ = 6[2 - 55] = 6*(-53) = -318

Therefore sum of the first 12 terms of the sequence. 1, -4, -9, -14, . . = -318

8 0
3 years ago
Read 2 more answers
Can someone help me please
Stells [14]

Answer:

52.7%

Step-by-step explanation:

If I am correct it means to round the percentage, so it would be 58% if you are rounding it

6 0
3 years ago
Which equation is equivalent to I = prt?
horsena [70]

Answer: Choice D.  P = i/rt

This is the same as saying P = i/(rt). The parenthesis are preferred in my opinion to indicate we have rt in the denominator and not just r.

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

Explanation:

In the original equation, prt is the same as p*r*t. So we multiply p, r and t to get prt.

This can be thought of as p*(rt). To isolate p, we undo the multiplication done to the variable p. We will divide both sides by rt to get

i = prt

i = p*(rt)

i/(rt) = p*(rt)/(rt) ... dividing both sides by rt

i/(rt) = p

p = i/(rt)

5 0
3 years ago
Determine if the following sample is random or not. Mr. Newman chooses the first four students to be center leaders.
lapo4ka [179]
What following example. There is no example for us to help u with
7 0
3 years ago
5 • (- 10) x = 100 Esse número apagado foi <br><br> (A) 2<br> (B) 20<br> (C) -5<br> (D) -257*
Anettt [7]
The answers is A
Explanation ;)
4 0
3 years ago
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