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Anika [276]
3 years ago
5

What is the first term in the sequence for which d = -2 and a7 = 3?

Mathematics
2 answers:
julia-pushkina [17]3 years ago
8 0

Answer:

c.

15

Step-by-step explanation:

AnnZ [28]3 years ago
7 0

Answer:

Final answer is c. 15

Step-by-step explanation:

We need to find about what is the first term in the sequence for which d = -2 and a7 = 3

We will use nth term formula of arithmetic sequence.

a_n=a+\left(n-1\right)d

we have been given a7 that means 7th term is 3

so plug n=7, d=-2 and a_n=3 into above formula

3=a+\left(7-1\right)(-2)

3=a+6(-2)

3=a-12

15=a

Hence final answer is c. 15

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3 years ago
Mr. Walker asked his students to use the associative property to find an expression that is equivalent to (13 + 15 + 20) + (20 +
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HERES THE ANSWER AND EXPLINATION

⇒Associative property of Addition is applied for three real numbers.For, any three real numbers, A, B and C
≡A+B+C=A+(B+C)=(A+B)+C=(A+C)+B→→→Associative Property of Addition
that is , we can add any two numbers first and then the third number with them.
⇒Also, Commutative Property of Addition of two numbers says that for any two numbers , A and B
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Answer Written by Jerry
→(20+13+15)+(20+47+18)
Answer Written by Layla
→(20+47+18)+(13+15+20)
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Option B ⇒Two(Jerry, Layla)
8 0
3 years ago
(05.05)
Natalka [10]
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Nostrana [21]

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With what though?

Step-by-step explanation:

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