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Harlamova29_29 [7]
3 years ago
7

A local business wants to donate $3,000 in graduation scholarships. They are looking to split this amount

Mathematics
1 answer:
MrMuchimi3 years ago
8 0
Don't trust those link my guy it's a scam or virus
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Let a4+a8+a12+a16=224. Find the sum of first 19 term in sequence.
Tomtit [17]

Without knowing anything about the sequence, this is impossible to answer. But suppose the sequence is arithmetic, in which case each term differs by some constant k:

a_2=a_1+k

a_3=a_2+k=a_1+2k

a_4=a_3+k=a_1+3k

\ldots

a_n=a_{n-1}+k=a_1+(n-1)k

Then we can write

a_4+a_8+a_{12}+a_{16}=4a_1+36k=224\implies a_1+9k=56

and from the formula above, we see this means the 10th term in the sequence is a_{10}=56. But that's all the specific info we can gather about such an arithmetic sequence. If we set the first term to be some unknown a_1=a, then the sum of the first 19 terms in the sequence would be

\displaystyle\sum_{n=1}^{19}a_n=\sum_{n=1}^{19}\big(a+(n-1)k\big)=19a+k\sum_{n=1}^{18}n=19a+171k

If we knew one more term in the sequence, we could determine the value of k and derive the value of a (if the first term a_1 is not immediately given), and then go on to find an exact numeric value for the sum.

7 0
3 years ago
What is the answer to this ?
BARSIC [14]

Answer:

b ithinkmfx!vv. vgvvgg. gvvhgvg yh

6 0
3 years ago
Read 2 more answers
Find 10-3. write the subtraction fact two ways.
vesna_86 [32]
10-3=7 3-10=7 if u need help with anything else u can ask
6 0
3 years ago
Which statement describes the relationship between the line graphs of the equations below? y = −2 x + 4 y = 1/2x + 4 a. The line
svetoff [14.1K]

Answer:

You can tell from the picture

Step-by-step explanation:

they intercept

4 0
4 years ago
The number of patients treated at Dr. Frank's dentist office each day was recorded for nine days: 18, 19, 19, 4, 14, 8, 22, 3, 1
ludmilkaskok [199]

Answer:

12

Step-by-step explanation:

To find the mean, add up all the numbers

18+ 19+ 19+ 4+14+ 8+ 22+ 3+ 1

108

Then divide by the number of terms

108/9 =

12

6 0
3 years ago
Read 2 more answers
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