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igor_vitrenko [27]
3 years ago
11

Determine if the sequence is algebraic or geometric, and find the common difference or ratio.

Mathematics
2 answers:
Trava [24]3 years ago
5 0

Answer:

Correct answer is A.  Algebraic, common difference = −10

Alekssandra [29.7K]3 years ago
3 0

Answer:

  A.  Algebraic, common difference = −10

Step-by-step explanation:

The difference between the first two terms is -10, as it is between the next two terms. The ratio of the first two terms is -1; of the next pair: -15/-5 = 3. There is a common difference, but not a common ratio.

The sequence is algebraic with a common difference of -10.

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I'm a little bit confused about how to approach this can someone help?
Taya2010 [7]

Answer:

4

Step-by-step explanation:

ΔABC is congruent with ΔDEF.  That means the corresponding sides are congruent.

Look at the order of the letters.  EF are the last two letters of ΔDEF.  So this corresponds with the last two letters of ΔABC.  Therefore, EF ≅ BC.

EF ≅ BC

x² + 8x = 48

x² + 8x − 48 = 0

(x + 12) (x − 4) = 0

x = -12 or 4

Since x can't be negative, x = 4.

5 0
3 years ago
In investing $6,200 of a couple's money, a financial planner put some of it into a savings account paying 4% annual simple inter
ddd [48]

Answer:

$ 2,600 was invested at 4% and $ 3,600 was invested at 9%.

Step-by-step explanation:

Given that in investing $ 6,200 of a couple's money, a financial planner put some of it into a savings account paying 4% annual simple interest, and the rest was invested in a riskier mini-mall development plan paying 9% annual simple interest, and the combined interest earned for the first year was $ 428, to determine how much money was invested at each rate, the following calculation must be performed:

3000 x 0.04 + 3200 x 0.09 = 408

2500 x 0.04 + 3700 x 0.09 = 433

2600 x 0.04 + 3600 x 0.09 = 428

Therefore, $ 2,600 was invested at 4% and $ 3,600 was invested at 9%.

7 0
3 years ago
If f(x) = 3x^2 + 2x, then find the value of y when x = -1.
loris [4]

Answer:

1

Step-by-step explanation:

-1 to the power of 2 is 1

1 times 3 is 3

2 times -1 is -2

3+(-2)=1

7 0
3 years ago
Each side of a square is (7 + 3x) units. Which is the perimeter of the square?
erastovalidia [21]

Answer:

49 + 9x units

Step-by-step explanation:

perimeter is sum of all the sides

4 0
2 years ago
Indicate whether the following congruence statement is true or false.<br> 50 points
andreyandreev [35.5K]

Step-by-step explanation:

The congruence statement is correct as KL = KR, LM = RQ and MK = QK. Also all the congruent angles correspond to the respective letters.

8 0
3 years ago
Read 2 more answers
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