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Dafna1 [17]
2 years ago
14

PLEASE HELP!!!

Mathematics
2 answers:
Luda [366]2 years ago
8 0
A. because this happened to my sister 4 times already 
Oduvanchick [21]2 years ago
6 0
The answer would be (C. She may not be able to secure another loan for the next semester.)
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What is the sum of the first 6 terms of this geometric sequence? –4, –16, –64, –256, …
MatroZZZ [7]

a_1=-4;\ a_2=-16;\ a_3=-64;\ a_4=-256;\ ...\\\\r=\dfrac{a_{n+1}}{a_n}\to r=\dfrac{a_2}{a_1}\to r=\dfrac{-16}{-4}=4

The formula of the sum of a geometric sequence:

S_n=a_1\cdot\dfrac{1-r^n}{1-r}

We have:

a_1=-4;\ n=6;\ r=4

substitute:

S_6=-4\cdot\dfrac{1-4^6}{1-4}=-4\cdot\dfrac{1-4096}{-3}=-4\cdot\dfrac{-4095}{-3}=-4\cdot1365=-5460

Answer: C. -5460

6 0
3 years ago
2x+14= -21-5x<br> Need to find out what x is but a step by step explanation please
adoni [48]
Notice how on both sides of the equation there is one coefficient (number being multiplied by x) and a constant (just a plain number). You want all constants to be on one side and all coefficients on the other. He’s how do to that:
2x+14=-21-5
I am choosing that all constants will be on the right side, so I will do the inverse operation of any constant on the left side to remove it. Here, a constant on the left side is 14. I will subtract 14 from both sides of the equation. Positive 14 minus 14 is zero, so it cancels out and removes it.
2x+14-14 = -21-5x
2x = -35-5x
See how the 14 is now gone? The equation looks much simpler now. Okay next, you can see that there is a coefficient on the “constant side” that I’ve chosen, so I am going to remove that. Negative 5 plus positive 5 equals zero. Do this on both sides of the equation.
2x+5x = -35-5x+5x
7x = -35
Now the equation is just two numbers. All that is left to do is divide by the last coefficient, 7, in this case.
7x/7 = -35/7
x = -5
8 0
1 year ago
Read 2 more answers
there are 267 students and 21 adults goin on a school trip. an equal number of people will ride on each bus. if there are 9 buse
Hunter-Best [27]
267+21 = 288
288/9 = 32

the answer is 32 people will ride on each bus
4 0
3 years ago
Read 2 more answers
Find the 81st term of the arithmetic sequence -10, -25, -40
Maurinko [17]

Answer:

5 - (N x 15)

81 x 15 = 1215

5-1215=-1210

-1210 should be the 81st term

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Plss help
KonstantinChe [14]

\frac{1}{2} \times 5 \times 16 \\ 40 \\ ke = 40joules

if correct mark me as brainiest

4 0
3 years ago
Read 2 more answers
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