3 years ago

9a + 18c. What is the value of the expression when a = −5 and c = −1?

1 answer:

4 0

1. plug in the numbers for the variables, like this: 9(-5)+18(-1)

2. solve
Hopefully this helps! Let me know if you need more explanation.

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Find Sn for the given arithmetic series a1=-26 d=-9 n=24

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Answer:

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Step-by-step explanation:

The sum to n terms of an arithmetic series is

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Substitute the given values into the formula

$S_{24}$ = $\frac{24}{2}$ [ (2 × - 26) + (23 × - 9) ]

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Step-by-step explanation:

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