3 years ago

What set of numbers does -1/2 belong to

Mathematics

1 answer:

MariettaO [177]3 years ago

5 0

-1/2 is a real number. It also a rational number.

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Find the sum of the series and show your process for finding each term leading to the final sum.

Crazy boy [7]

ANSWER

$\sum_{k=3}^5( - 2k + 5) = - 9$

EXPLANATION

The given series is

$\sum_{k=3}^5( - 2k + 5)$

This series is finite.

The expanded form is

$\sum_{k=3}^5( - 2k + 5) = ( - 2 \times 3 + 5) + ( - 2 \times 4 + 5) + ( - 2 \times 5 + 5)$

This simplifies to

$\sum_{k=3}^5( - 2k + 5) = ( - 6 + 5) + ( - 8+ 5) + ( - 10+ 5)$

$\sum_{k=3}^5( - 2k + 5) = ( - 1) + ( - 3) + ( - 5)$

$\sum_{k=3}^5( - 2k + 5) = - 9$

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3 years ago

A man bought a horse and carriage for $500 paying three times as much for the carriage as for the horse how much did each cost

Lorico [155]

Hello! So, in order to solve this question, we should do 500/4. 500/4 = 125. Multiply 125 by 3 and you get 375. The horse costs $125 and the carriage costs $375.

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3 years ago

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What % is 2000 from 40,000

3241004551 [841]

Answer:

Step-by-step explanation:

2000/40000 = 0.05

All you do is divide both numbers and you'll get the decimal form which in this case is 0.05 which means 5%.

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3 years ago

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What property is shown in this equation? (2 X 1/2) + 8 = 1+8

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The property shown in the following equation is 9 beacause simply we know 9=1 +8 so its easy

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21x+28=14 and 9x+12y=6

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