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tatiyna
2 years ago
15

An arithmetic sequence has this recursive formula:

Mathematics
1 answer:
maria [59]2 years ago
3 0

Answer:

C

Step-by-step explanation:

C is the answer because a1=7 , d=-4 and so it's

an=an+(n-1)d

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9.44 x 10^4 in scientific notation

Step-by-step explanation:

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11.3 ft

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sin = opp/hyp

hyp = opp/sin

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Use calculator

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Eva has £6.05 in her moneybox.
PIT_PIT [208]

Answer:

11 of 20p, 22 of 10p and 33 of 5p

Step-by-step explanation:

Eva has 20p, 10p and 5p coins, total of £6.05 = 605p

Let 20p=x, 10p=y, 5p=z

<u>Then</u>:

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<u>Rewriting the first equation considering next two:</u>

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3 0
3 years ago
Solve the system by elimination <br> 2x+6y= -12 <br> 5x-5y= -10
kvv77 [185]
First thing you should do is reduce coefficients.

1st equation has all multiples of '2'. Divide by 2
---> x +3y = -6

2nd equation has multiples of 5. Divide by 5.
---> x - y = 2

Now elimination part is easier. 
Eliminate 'x' variable by subtracting 2nd equation from 1st.

   x + 3y = -6
-(x  - y = 2)
----------------------
       4y  = -8

Solve for 'y'
4y = -8

y = (-8)/4 = -2


Substitute value for 'y' back into 2nd equation:
x - (-2) = 2
x + 2 = 2
x = 0

Solution to system is:
x=0, y =-2

5 0
3 years ago
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I need help with 5 and 6
Iteru [2.4K]

Answer:


Step-by-step explanation: a is number 6 and c for number 5


6 0
3 years ago
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