3 years ago

Which expression is equivalent to 13 - (-8)?

Mathematics

1 answer:

Elina [12.6K]3 years ago

3 0

Answer is D!

a negative and a negative equals a positive

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omeli [17]

$a_n=48+3(2n-1)$

The formula of the sum of the arithmetic sequence:
$S_n=\dfrac{a_1+a__n}{2}\cdot n$
calculate:
$a_1=48+3(2\cdot1-1)=48+3=51$
substitute
$S_n=\dfrac{51+48+3(2n-1)}{2}\cdot n=\dfrac{99+6n-3}{2}\cdot n=\dfrac{96+6n}{2}\cdot n=3n^2+48n$
Your answer is:
$\boxed{f(x)=3x^2+48x}$

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Step-by-step explanation:

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Equation that turns -3 to 3

denis23 [38]

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Twelve less than 5 times a number is greater than or equal to 6 more than twice the number. Each inequality and number line repr

jenyasd209 [6]

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Step-by-step explanation:

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