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olga_2 [115]
3 years ago
9

*11. Find the value of the expression (-1)+2+(-3) + 4 + ... + (-99) + 100. Solution

Mathematics
2 answers:
scZoUnD [109]3 years ago
8 0

Answer:

50.

Step-by-step explanation:

Each pair of numbers add up to 1:

-1 + 2 =  1,  -3 + 4 = 1   and so on

There are 50 of theses pairs so the value is 50.

zhannawk [14.2K]3 years ago
4 0
  • Answer:

<em>50</em>

  • Step-by-step explanation:

<em>(-1) + 2 + (-3) + 4 + ... + (-99) + 100 =</em>

<em>= 2 - 1 + 4 - 3 + .. + 100 - 99</em>

<em>= 1 + 1 + .. + 1 </em>

<em>= 50×1</em>

<em>= 50</em>

You might be interested in
3a
Jet001 [13]

Answer:

Option D is correct.

VS = 20 units.

Step-by-step explanation:

The complete question is contained in the attached image to this answer.

From the image attached and the additional information about the triangles, it is evident that that triangle VSW is similar to triangle QSR.

Hence, we can write the ratio as

(VS/QS) = (VW/QR)

VS = 2a

QS = 2 × VS = 2 × 2a = 4a

VW = 2a - 2

QR = 3a + 6

(2a)/(4a) = (2a - 2)/(3a + 6)

Cross multiplying,

2a (3a + 6) = 4a (2a - 2)

3a + 6 = 2 (2a - 2)

3a + 6 = 4a - 4

4a - 3a = 6 + 4

a = 10

VS = 2a = 20 units.

Hope this Helps!!!

4 0
4 years ago
In mrs. prosser's class there are 32 students. If 3 out of every 8 prefer to ride their bicycles to school, how many students in
Molodets [167]
First divide 32 by 8

32/8

=4

Then multiply the 4 by 3 to find out how many students in the class like to ride their bicycles to school

4x3

12 students is your answer
8 0
3 years ago
Solve in step wise.<br>​
monitta
Ahh yes so u have to solve for x then substitute and subtract ur x and y coordinates so u can find the domain and range properly.
7 0
3 years ago
HELLPPP MEEEEEEE PLEASEEEEE l:(
trasher [3.6K]

Answer: the answer is 6x-5=36

Step-by-step explanation:

dont blame me this is how i was taught

6 0
3 years ago
Read 2 more answers
Is 12a-a simplified?
7nadin3 [17]
12a−a

=12a−1a

=12a+−1a

=a+a+a+a+a+a+a+a+a+a+a+a+−a

=a+a+a+a+a+a+a+a+a+a+a

=11a

5 0
4 years ago
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