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PtichkaEL [24]
3 years ago
11

Find the number of terms, n, in the arithmetic series whose first term is 15, the common difference is 4, and the sum is 3219. P

ls I need help ASAP I will give top answer.
A. 33
B. 35
C. 37
D. 36
Mathematics
1 answer:
klio [65]3 years ago
6 0

Answer: 37

Step-by-step explanation:

I guessed on the quiz and got it right

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Quadratic Equation Word Problem
Crazy boy [7]
------------------------------------------------------
Define x :
------------------------------------------------------
Let the width be x.

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Find Area of the walkway :
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Area = 30x + 30x + 20x + 20x + 4x²       
Area = 100x + 4x²

------------------------------------------------------
Find cost of the walkway in term of x:
------------------------------------------------------
1m² = $10
100x + 4x² = 10(4x² + 100x)
(100x + 4x²)m = $(40x² + 1000x)

------------------------------------------------------
Find Width of the walkway :
------------------------------------------------------
The budget is $6000

40x² + 1000x = 6000
40x² + 1000x - 6000 = 0
x² + 25x -150 = 0              //Divide by 40 through
(x - 5)(x + 30) = 0             //Factorise
x = 5 or x = -30 (Rejected, width cannot be negative)

------------------------------------------------------
Answer: The width can be 5m wide.
------------------------------------------------------

5 0
3 years ago
In a city the population is increasing exponentially at a rate of 1.6% per year.
SCORPION-xisa [38]

Answer:

37.36%

Step-by-step explanation:

Each year it increases 1.6%.

So year 1 it increases (1+1.6%), year 2 increases (1+1.6%)^2 and so on...

so after 20 years, overall increase is found by 1.016^20 = 1.3736 or increase of 37.36%

please give thanks :)

3 0
3 years ago
Read 2 more answers
Round 2.51 to 1 decimal place
Leni [432]

Answer:

2.5

Step-by-step explanation:

It's because 1is less than 5

8 0
2 years ago
Read 2 more answers
goran spent $38 on fruit at the grocey store.He spent a total of 40$ at the store.what percentage of the total he spend of the f
lakkis [162]
The answer should be 95% I hope this helps :)
5 0
2 years ago
If Jake drove 3/4 of the 128-mile trip, how many miles did he drive?
Gnoma [55]
3/4*128=96
He drove 96 miles
7 0
3 years ago
Read 2 more answers
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