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VikaD [51]
3 years ago
14

What is the 30th term of 3n-1

Mathematics
1 answer:
marishachu [46]3 years ago
7 0
<span>a_n = a_1 + (n-1)d
a_n = 4 + 3(n-1) = 3n + 1
So the 30th term is a_30 = 3*30 + 1 = 91</span>
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A. ∠2<br><br> B.∠5<br><br> C.∠4<br><br> D.∠3
Shkiper50 [21]
The answer is <span>D.∠3
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6 0
4 years ago
Nine scores have an average of 8. Scores x and x+1 are added, and these increase the average to 9. Find x
Degger [83]

Answer:

x must be 13

Step-by-step explanation:

Represent the nine scores by a, b, c, d, e, f, g, h, i.

Write the following equation to indicate that the average of these nine scores is 8:

a+b+c+d+e+f+g+h+i

----------------------------- = 8, or <em>a+b+c+d+e+f+g+h+i = 72</em> if we multiply both

               9                      sides of this equation by 9.

Next, we add scores x and x+ 1 to

a+b+c+d+e+f+g+h+i  +  x + x + 1

and divide the result by 11, as there are now 11 scores instead of just 9:

a+b+c+d+e+f+g+h+i  +  x + x + 1

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

                        11

Earlier, we saw that a+b+c+d+e+f+g+h+i = 72.  We can now replace

a+b+c+d+e+f+g+h+i in the above fraction by 72:

 72 + 2x + 1

------------------- = 9 (as the new average is 9)

         11

Multiplying both sides of this equation by 11 results in:

73 + 2x = 99, or  2x = 26.

Then x must be 13, and x + 1 must be 14.

3 0
3 years ago
Start at (12, 3). Move 2 units right and 7 units up. Where do you end up?
Korolek [52]

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Step-by-step explanation: well if you say start at (12, 3) move 7 units up then 3 units right then it would make it easier to figure it out cus as you can see start at 3 and go up 7 it would stop at 10 then if you go over 2 from 12 it would stop at 10

6 0
3 years ago
Help with the question above please????
sukhopar [10]
Don’t even know sry bout that
7 0
3 years ago
What's another way to write (6+7)x?
Annette [7]
I think 6x+7x because i think u distribute 
6 0
3 years ago
Read 2 more answers
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