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o-na [289]
3 years ago
10

Find the 17th term of the arithmetic sequence with the terms a1=-7 and d=3

Mathematics
1 answer:
Marizza181 [45]3 years ago
6 0

Answer:

41

Step-by-step explanation:

The n th term of an arithmetic sequence is

a_{n = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = - 7 and d = 3, thus

a_{17} = - 7 + (16 × 3) = - 7 + 48 = 41

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Answer:

105 catfish

Step-by-step explanation:

48 - 3 = 45

45 + 60 = 105

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The following are the temperatures of 10 days in winter in °C.
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Answer:

0.9

Step-by-step explanation:

To find the mean temperature, we have to add all of the numbers together and divide that by the amount of numbers there are.

6 + 5 + 3 + -4 + 3 + -3 + 2 + -1 + -2 + 0 = 9

There are 10 numbers.

Our mean, or average, would be 9 / 10 = 0.9

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3 years ago
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Answer:

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Read 2 more answers
factorise the following 1. x²-2x+15.... 2. y²-19y+90​
Marta_Voda [28]

Answer:

1. x²-2x+15

This can't be factored, I've tried multiple ways now, but it just can't be factored.

2. y²-19y+90​

Let's factor y^2−19y+90

y^2−19y+90

The middle number is -19 and the last number is 90.

Factoring means we want something like

(y+_)(y+_)

Which numbers go in the blanks?

We need two numbers that...

   Add together to get -19

   Multiply together to get 90

Can you think of the two numbers?

Try -9 and -10:

   -9+-10 = -19

   -9*-10 = 90

Fill in the blanks in

(y+_)(y+_)

with -9 and -10 to get...

(y-9)(y-10)

Answer:

(y−9) (y−10)

3 0
3 years ago
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