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yKpoI14uk [10]
3 years ago
14

15x – 2(4x + 1) = -9

Mathematics
2 answers:
Oksi-84 [34.3K]3 years ago
6 0

Answer:

-1

Step-by-step explanation:

15x-8x-2=-9

Or, 7x=-9+2

Or, 7x=-7

Or, x=-7/7

Or, x =-1

Sedaia [141]3 years ago
4 0
15x-2(4x+1)=-9
15x-8x-2=-9
7x-2=-9
7x=-7
X=-1
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I need help with this one please
Semmy [17]

Answer:

A

Step-by-step explanation:

a geometric sequence is where we multiply a factor from element to element.

a1 = $900

a2 = 981 = a1 × f = 900 ×

a3 = 1069.29 = a2 × f = a1 × f × f = s1 × f²

an = 900 \times  {f}^{n - 1}

so, now let's try and get f.

remember, 981 = 900 × f

f = 981/900 = 109/100 = 1.09

just to control, we check for s3 :

900 × (1.09)² = 900 × 1.1881 = 1069.29

correct.

so,

a13 = 900 × (1.09)¹² = 2,531.398304

s13 is then the sum of all a1, ..., a13

there is a nice formula for sums of finite sequences

s13 = 900 × (1-f¹³) / (1-f) = 900×(1-(1.09)¹³) / (1-1.09) =

= 900×(1-3.065804612) / (-0.09) =

= 900×(-2.065804612) / (-0.09) = 20,658.04612

.

7 0
3 years ago
2, 3, 6, 8, . . . is an example of an infinite alternating series. True False
vaieri [72.5K]
Answer: False.

Explanation: An alternating series is on in which the alternate terms are negative & positive.
Example, <span>1/2 − 1/4 + 1/8 − 1/16 + ⋯  is an alternating series.

but here, in the given series - all numbers are positive . Hence, it is not an infinite alternating series.

</span>
8 0
3 years ago
Read 2 more answers
What does p equal please help me.
Sauron [17]

Answer: p < -3/5

Step-by-step explanation:

2p - 4 < -3p - 7

+3p       +3p

------------------------

5p - 4 < -7

     +4   +4

------------------------

5p < -3 (divide by 5)

p < -3/5

3 0
3 years ago
What is the slope of the line whose function f satisfies f(−2)=1  and  f(5)=−10f(−2)=1  and  f(5)=−10?
Radda [10]
M = (f(5) -f(-2))/(5 -(-2)) = (-10 -1)/7
m = -11/7

The slope of the line is -11/7.

4 0
3 years ago
Will give brainliest!! 30 points!! need answer asap!!
OlgaM077 [116]

Answer:

the answer is c

Step-by-step explanation:

4 0
3 years ago
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