Write a rule for the nth term of the arithmetic sequence. d=2, a12=18. Please explain!

Answers

Answer 1

Answer: 1.an = 3n - 1 2. an = 2(2n - 3) 3.an = 4^n 4.an = (2/3)^n 5. an = (-1)^n(n + 5) 6. an = (-1)^n + 1(n + 6) 7. an= n+3/2n-1 8. a1 = -5 and an = an-1 - 3 for n ≥ 2 9. a1 = -6 and an = -2an-1 for n ≥ 2 10.a1 = 4 and an = 3an-1 + 2 for n ≥ 2 11. Find a8 when a1...

Answer 2

Answer: I have no idea what you mean right now. Can you get a picture of whatever it is you are having trouble on?

Related Questions

Solve for x. 16 = -2x - 1x = -8x = -7x = 7x = 8
Why did the math teacher open a window company?
16 is 25% of what number???
Our school swimming pool is 25 m long . If our coach wants us to swim 3 kilometers how many lengths of pool will we need to swim?
If Ben bikes 3 miles and then bikes 1,000 yards back toward his starting point, how many yards is Ben from his starting point?

Find all solutions for X and check. (different from the other question I asked earlier) thanks!

Answers

$\displaystyle \n 17) \n x(5x-10)=0 \n x = 0 ~~\texttt{or}~~5x-10 = 0 \n x_1 = \boxed{0} \n \n x_2 = (10)/(5) =\boxed{2} \n \texttt{Check: } \n x_1 = 0~~\Longrightarrow ~~ 0(5\cdot 0 - 10) = 0 \cdot (-10) = 0 \n x_2 = 2~~\Longrightarrow ~~ 2(5\cdot 2 - 10) = 2(10 - 10) = 2 \cdot 0 = 0$

$\displaystyle 18) \n x^2 + 7x-18 = 42 \n x^2 + 7x-18 - 42 =0 \n x^2 + 7x-60 =0 \n .~~~~~7x = 12x - 5x \n \underbrace{x^2 + 12x} -\underbrace{5x - 60} = 0 \n \n x(x+12) -5(x+12)=0 \n (x+12)(x-5)=0 \n x + 12 = 0 ~~\texttt{or}~~x-5 = 0 \n \n x_1 = \boxed{-12} \n x_2 = \boxed{5} \n \n \texttt{Check: } \n x1 = -12 ~~\Longrightarrow~~ (-12)^2 + 7\cdot (-12)-18 = 144-84-18 = 42 \n \n x2 = 5 ~~\Longrightarrow~~ (5)^2 + 7\cdot (5)-18 = 25+35-18 = 42 \n \n$

Barbara claims that her horse can do simple addition problems. She showed her horse 8 different cards with simple addition problems, and the horse was able to tap his foot to indicate whether the answer was correct or incorrect. The horse correctly identified all 8 cards. Eric didn't believe Barbara's horse could do addition, so he set up a trial to test whether the horse was just guessing. He flipped 8 coins to see how many would land tails up. He did this 53 times, and the results are shown in the dot plot below:

Answers

Answer:

Yes, the chances of getting 8 correct by guessing are very low

there is no dot plot below so how are we going to help you

117 km : cm A 217 B 2.170 C 2 l .700 D 217.000

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its "d" boi easy one kilometer is 100000 cm

the answer is D: 217,000 cm
1 km=100,000 cm
2.17 km=2.17×100,000=217,000 cm

Which pair of ratios is proportionalA. 4/9 and 16/45
B.5/12 and 25/144
C. 12/18 and 18/27
D. 15/20 and 7/10

Answers

A. 4/9 and 16/45
16 / 4 = 4
45 / 9 = 5
Disproportional

B.5/12 and 25/144
25 / 5 = 5
144 / 12 = 12
Disproportional

C. 12/18 and 18/27
18 / 12 = 3/2
27 / 18 = 3/2
Proportional

D. 15/20 and 7/10
7 / 15 = 7/15
10 / 20 = 1/2
Disproportional

Answer: (c)

Let us check each of these.

A) 4/9 and 16/45
or, 1.44 and 1.355
1.44 ≠ 1.355    ( Wrong)

B) 5/12 and 25/144
or, 1.416 and1.17
1.416 ≠ 1.17    (wrong)

C) 12/18 and 18/27

or, 1.66 and 1.66
1.66 = 1.66    (Correct)

D) 15/20 and 7/10
=0.75 and 0.70
0.75 ≠ 0.70

Thus, the answer is (C)

What does it mean for an equation to express y in terms of x?

Answers

it really doesnt matter it just represents a particular equation either ways fine

a fishermen catches an average of 6 fish every 2 hours at this rate how many fish should he catch in 21 hours

Answers

Answer:

Step-by-step explanation:

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