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3 years ago

What value of s makes the statement true? (–7 + s) + (–14) = (12 + (–7)) + (–14)

1 answer:

6 0

In order to find the answer we can add and subtract all the like terms together.

(-7+s)+(-14)=(12+(-7))+(-14)
(-7+s)+(-14)=(5)+(-14)
(-7+s)=5
s=12

So, the answer MUST be D.

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What is the sum of the arithmetic series

docker41 [41]

Answer:

$S_ {12} = 192$

Step-by-step explanation:

The nth term of the given arithmetic sequence is

$U_n = 3 + 2n$

The first term of this series is:

$U_1 = 3 + 2(1) = 5$

The last term of this series is when

$n = 12$

$U_ {12}= 3 + 2(12)$

$U_ {12}= 3 + 24 = 27$

The sum of the first n terms of an arithmetic series when the first an last term is known is given by:

$S_n = \frac{n}{2}(a + l)$

Where a=5 is the first term and l=27 is the last term.

$S_ {12} = \frac{12}{2}(5 + 27)$

$S_ {12} =6(32) =19 2$

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3 years ago

Find three consctive postive integers such that the prodect of the median integer and the largest integer is 72

Tcecarenko [31]

Answer: 7,8,9

Step-by-step explanation:

Let the numbers be a, a+1 and a+2. Therefore, based on the question, this will be:

= (a + 1)(a + 2) = 72

a² + 2a + a + 2 = 72

a² + 3a + 2 - 72 = a

a² + 3a - 70 = 0

a² + 10a - 7a - 70 = 0

a(a + 10) - 7(a + 10)

a - 7 = 0

a = 7

Since a = 7

a + 1 = 7+1 = 8

a + 2 = 7+2 = 9

The numbers are 7,8 and 9

8 0

2 years ago

What is the sum of -6 4/5 and 6 4/5 ?

daser333 [38]

Answer:

Step-by-step explanation:

-6 4/5 + 6 4/5 equals zero.

3 0

3 years ago

Read 2 more answers

How many 1/20 in 7/8

MariettaO [177]

Answer:

17.5

Step-by-step explanation:

when you divide the two together you get 17.five

7 0

3 years ago

Can someone think of a poem which starts with "Today I feel ...."<br>pls

GuDViN [60]

Yes, I shall give you an idea of how to start it. :)

Today I feel glad...
For all the friends I have had...
They gave me a pleasure...
For all that I treasure...
Special and dear to my heart.

Ta da! :D Hope you like it

7 0

3 years ago

Read 2 more answers