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Murljashka [212]
3 years ago
15

Given the arithmetic sequence an = 2 + 4(n − 1), what is the domain for n?

Mathematics
2 answers:
balu736 [363]3 years ago
7 0
Maybe the first one, you need to identify a if you want an answer for sure
zlopas [31]3 years ago
3 0
The answer should be A the first one
You might be interested in
Paul is two years younger than Patricia. Daniel is 25% older than Patricia. Ten years ago, Daniel was 50% older than Patricia. H
Sergeeva-Olga [200]

We have 3 people: Paul, Daniel and Patricia. Let each name denote that person’s current age in years. Remember that % is the symbol for 1/100.


PAUL: (#A) Paul = Patricia – 2
DANIEL: 
(#B) Daniel = 125% * Patricia = 125 * (1/100) * Patricia = 1.25 * Patricia
(#C) Ten years ago, Daniel’s age at that time would have been Daniel’s current age – 10. IE “Daniel – 10”.
Ten years ago, Patricia’s age at that time would have been Patricia’s current age – 10. IE “Patricia – 10”. 
Ten years ago, Daniel’s age at that time (IE Daniel – 10) was 50% greater than Patricia’s age at the time (Patricia – 10). 
IE 

Daniel – 10 = 150% * (Patricia – 10)
Daniel – 10 = 1.50 * (Patricia – 10)
Daniel – 10 = 1.50 * Patricia – 1.50 * 10
Daniel – 10 = 1.50 * Patricia – 15
Daniel = 1.50 * Patricia – 15 + 10
Daniel = 1.50 * Patricia – 5


So now we have 3 equations in 3 unknowns:
(A) Paul = Patricia – 2
(B) Daniel = 1.25 * Patricia
(C) Daniel = 1.50 * Patricia – 5


Solve equations B & C simultaneously
 1.25 * Patricia = 1.50 * Patricia – 5
 1.25 * Patricia – 1.50 * Patricia = – 5
– 0.25 * Patricia = – 5
 Patricia = (– 5) / (– 0.25) 
Patricia = + 20

So now we can write the 3 people’s ages:
(a) Patricia = 20
(b) Paul = Patricia – 2 = 20 – 2 = 18
(c) Daniel = 1.25 * Patricia = 1.25 * 20 = 25

<span>
</span>

<span>Finally, we check our solution against the original question. </span>
Paul is two years younger than Patricia. ……… 20 – 2 = 18 ✔
Daniel is 25% older than Patricia. ……… 25 = 125% * 20 ✔
Ten years ago, Daniel was 50% older than Patricia. 25 – 10 = 150% (20– 10) ✔


Hope that helped :)

5 0
3 years ago
12) 10 + (-2)+1<br>how do i solve this?​
Step2247 [10]

Answer: 9

Step-by-step explanation: its very simple , first take the -2 out of the parenthesis and put is as 10-2+1 which is positive 9 because 10-2=8 and plus 1 is 9.

4 0
3 years ago
Creat an equation for a cubic function, in standard form, that has x- intercept given by the set {-3,1,7} and which passes throu
prohojiy [21]

Given :

Set of x-intercepts {-3,1,7},

point through which it passes (-2,54)

Now,

Step 1: Substitute value of x intercepts in equation, y=a(x-p)(x-q)(x-r), we get,

y=a(x-(-3))(x-1)(x-7)

y= a(x+3)(x-1)(x-7)               ... equation (1)

Step 2: substitute x an y with the point through which it passes,

54=a((-2)+3)((-2)-1)((-2)-7)

54 = 27a

∴ a=2

Step 3: Now, substituting value of a in equation (1), we have

y=(2x+6)(x^{2} -8x+7)

y=2x^{3}-10x^{2}  -34x +42   (Requited cubic equation)

   

6 0
3 years ago
Wassup guys? Define kinematics.​
Ghella [55]
Hello!
Kinematics by definition is the branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion.
4 0
2 years ago
Read 2 more answers
2(15+3m)-7<br><br> Plz explain and answer
Alekssandra [29.7K]
6m+23

You have to use distributive property, so 15x2=30 and 2x3m= 6m. You then subtract 30 from 7 and get 23. 


4 0
3 years ago
Read 2 more answers
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