Help me pls! ill rate you very good!!!!

Mathematics

2 answers:

Leona [35]2 years ago

8 0

Answer:

x < -2

Step-by-step explanation:

Sergio039 [100]2 years ago

4 0

Answer: x<-2.

I hope you do well with the rest! :)

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12) Find the sum, S7 for the geometric series {1 + 5 + 25 + - + 15625).

zhenek [66]

Understanding:

The sum of a geometric series is, $a+ar+ar^2+ar^3+...$ , with a being the start point and r is the common ratio. We can also use the following formula to make life easier $S_n=a\frac{1-r^n}{1-r}$ , a is your start point, r is the common ratio, and n is the number of terms, which in our case is S7.

Solution:

Our start point is 1, $a=1$ ,

The common ratio is 5, $r=5$ ,

And finally, the number of terms is 7, $n=7$ .

$S_n=a\frac{1-r^n}{1-r} \\=(1)\frac{1-(5)^{(7)}}{1-(5)} \\=\frac{1-78125}{1-5} \\=\frac{-78124}{-4}\\=19531$

The answer is [A] 19531.

7 0

2 years ago

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Please help, I will give brainliest, I am struggling badly.

Alja [10]

Answer:

Step-by-step explanation:

Notice they both have the same slope of 3x so they are parallel, but different y intercepts. This means the lines never intersect and thus there are no solutions to the system of equations.

3 0

2 years ago

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What is sinK? a. 12/13 b. 13/12 c. 5/13 d. 5/12

ki77a [65]

Answer:

a. 12/13

Step-by-step explanation:

Sin is opposite over hypotenuse.

Opposite side of K is 12 and your hypotenuse is 13

7 0

2 years ago