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Advocard [28]
2 years ago
13

The product of 0.4 and a number is 8 write a mathematical expression to represent the verbal expression. Use n for the variable

solve the expression
Mathematics
1 answer:
kipiarov [429]2 years ago
3 0

Answer:

0.4n = 8

n = 20

Step-by-step explanation:

0.4n = 8

n = 8 / 0.4

n = 20

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Write out the sum. Do not evaluate.<br><br>∑∑k=1 (k^2-5k-3)<img src="https://tex.z-dn.net/?f=4%5C%5CE%28K%5E2-5k-3%29%5C%5Ck%3D1
VARVARA [1.3K]

Series are sum of a given sequence.. The sum of the given expression is -33

<h3>Sequence and series</h3>

Series are sum of a given sequence. According to the given expression

∑∑k=1 (k^2-5k-3)

Taking the sum from k = 1 to k = 4

Sum = (1-5-3) + (4-10-3) +(9-15-3)+(15-20-3)

Sum = (-7) + (-9) + (-9) + (-8)

Sum = -33

Hence the sum of the given expression is -33

Learn more on sum notation here: brainly.com/question/542712

#SPJ1

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