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IRISSAK [1]
2 years ago
15

Here are the first five terms of a quadratic sequence. 9 24 47 78 117 Find an expression, in terms of n, for the nth term of thi

s sequence.
​
Mathematics
1 answer:
tensa zangetsu [6.8K]2 years ago
5 0

Answer:

4n^2+3n+2

Step-by-step explanation:

9 24 47 78 117

 15  23

     8

8/2 = 4

=4n^2

9-4 = 5 (the minus value come from 4n^2 where n is the position where 9 lays)

24-16 = 8

47-36 = 11

so plus 3 every time so 3n

4n^2+3n for the first value is 7 so you need an extra 2

4n^2+3n+2

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Solve for x ln(3x+2)=4
Rasek [7]

Answer:

x = (e^4 -2)/3

x≈17.533

Step-by-step explanation:

ln(3x+2)=4

raise each side to e

e^ ln(3x+2) = e^4

3x+2 = e^4

subtract 2 from each side

3x = e^4 -2

divide by 3

x = (e^4 -2)/3

putting this in a calculator

x≈17.533

5 0
3 years ago
Read 2 more answers
10. The sum of two numbers is 102. One number is three less than twice the other.
netineya [11]

Answer:

(2n -3) + n = 102

2n - 3 + n = 102

3n - 3 = 102

3n = 105

n = 35 (the first number)

SO...

The other number is (2 x 35) - 3 =

                                           70 - 3 = 67 (the second number)

The numbers are 35 and 67.

35 + 67 = 102 CHECK!

7 0
3 years ago
Find the descriminant? forgot how.
ivanzaharov [21]
In a quadratic equation, the discriminant<span> helps tell you the number of real solutions to a quadratic equation. The expression used to </span>find the discriminant<span> is the expression located under the radical in the quadratic formula!</span>
8 0
3 years ago
Read 2 more answers
Which expression finds the measure of an angle that is coternal with a 45° angle?
Serhud [2]

Answer:

-315

Step-by-step explanation:

same terminal side

7 0
3 years ago
Gretchen earns extra money mowing lawns on the weekend. She mows 3 lawns per hour and earns $12.00 per lawn. How much does Gretc
stepladder [879]

Gretchen will earn $48 from mowing in 4 hours

Data

  • Amount earned on each lawn = $12
  • Number of hours mowing = 4 hours

<h3>What is Rate</h3>

This is the measure of one unit against another unit. An example of this is speed which is the rate of distance covered to time.

In this case, she mows 1 lawn in each hour and earns $12 on each.

To calculate for 4 hours

4*12=$48

She earns $48 from mowing 4 lawns

learn more on rates here;

brainly.com/question/8728504

4 0
2 years ago
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