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BlackZzzverrR [31]
3 years ago
13

For each geometric sequence, find a recursive rule by finding the common ratio by calculating the ratio of consecutive terms. Fi

nd an explicit rule for the sequence by finding each term as the product of the first term and a power of the common ratio. n 1 2 3 4 5 an 50 25 12.5 6.25 3.125 The recursive rule is a1 = and an = an − 1 for n ≥ . The explicit rule is an = ()n − 1.
Mathematics
1 answer:
Monica [59]3 years ago
7 0
50 (1/2)^(n-1) is the equation for the given geometric sequences.

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Find each percent decrease. Round to the nearest percent.
Vsevolod [243]

Answer:

67%

Step-by-step explanation:

First of all, we must find the decrease;

39 - 13

=26

Then we can find the percentage decrease

26/13 ×100 =66.666..which can be written as 67.

5 0
3 years ago
Solve for x:<br> Need help with this problem.
rusak2 [61]

The sum of all angles in a triangle is equal to 180.

75 + 70 + 5 + 3x = 180

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3x = 180 - 150

3x = 30

x = 10

Third angle:

5 + 3(10)

35

4 0
3 years ago
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Solve the quadractic equation 3x^2-5x-7=0
finlep [7]

Answer:

2.113 and -0.446

Step-by-step explanation:

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5 0
2 years ago
Which of the followings are the amplitude and the equation of the midline of the curve
Juli2301 [7.4K]

Answer:

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Step-by-step explanation:

7 0
3 years ago
If m&lt;FHI=142, what are m&lt;FHG and m&lt;GHI​
lisabon 2012 [21]
<h3>Answers:</h3>

angle FHG = 42 degrees

angle GHI = 100 degrees

=========================================================

Explanation:

FHI is the largest angle. It is split into two pieces FHG and GHI which have measures of (3x+6) and (9x-8) degrees respectively.

Put another way, those two smaller angles (FHG and GHI) combine to form the larger angle (FHI)

This is the angle addition postulate.

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

(angle FHG) + (angle GHI) = angle FHI

(3x+6) + (9x-8) = 142

3x+6+9x-8 = 142

(3x+9x) + (6-8) = 142

12x - 2 = 142

12x-2+2 = 142+2 ... adding 2 to both sides

12x = 144

12x/12 = 144/12 .... dividing both sides by 12

x = 12

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

Use that x value to find the angles we're after

angle FHG = 3x+6 = 3*12+6 = 36+6 = 42

angle GHI = 9x-8 = 9*12-8 = 108-8 = 100

Note how

(angle FHG) + (angle GHI) = 42 + 100 = 142

which is the measure of angle FHI. This confirms the answers.

8 0
3 years ago
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