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Maurinko [17]
4 years ago
7

How do you solve 100-99+98-97+96-85+.........+4-3+2-1? and show the pattern for it

Mathematics
1 answer:
andreyandreev [35.5K]4 years ago
7 0

Answer:

50

Step-by-step explanation:

100 − 99 + 98 − 97 + 96 − 95 + ... + 4 − 3 + 2 − 1

(100 − 99) + (98 − 97) + (96 − 95) + ... + (4 − 3) + (2 − 1)

1 + 1 + 1 + ... + 1 + 1

50(1)

50

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How do i round 74,600 to the nearest thousand​
Nataly [62]

Answer:

75000

hope this helps u

brainliest pls

Step-by-step explanation:

Let 7.1239 is a decimal number. Now, we have to round the given decimal number to its nearest thousandth.

Step 1: Identity the thousandth digit. (Here, 3 is the digit which is in thousandth place)

Step 2: Now, look at the digit, which is next to the thousandth place. If that digit is less than 5, round down the thousandth digit. If that digit is greater than or equal to 5, round up the thousandth digit. From the example given above, the digit next to the thousandth digit (i.e., 9) is greater than 5, so we have to round up the thousandth digit.

Step 3: Thus, the number 7.1239 rounded to the nearest thousandth is 7.124.

7 0
3 years ago
Question 1 of 25
padilas [110]
I believe it’s 11n -4 -40
5 0
3 years ago
Kendra ordered a set of blue and brown pins. She received 100 pins, and 30% of them were blue. How many blue pins did Kendra rec
natka813 [3]

Answer:

30 blue pins

Step-by-step explanation:

30% is the same as 30 out of 100, so this can be written in this fraction: \frac{30}{100}

now, you should multiply this fraction by the total number of pins she ordered:

100 x \frac{30}{100}

to solve this, you can simplify by dividing 100 by 100, this equals 1

30 times 1 is 30

there are 30 blue pins

8 0
3 years ago
Read 2 more answers
Sally has twice as many dimes as nickels. The total value is $3.50 how many nickels and dimes does she have?
Murljashka [212]
D=2n
.05n+.1d=3.5
I multiplied the nickels and dimes by these values because that is their actual monetary value 
.05n=3.5-.1d
multiply everything by 20
n=70-2d
d/2=70-2d
.5d+2d=70 
2.5d=70
d=28 
n=14 
so there are <u>28 dimes and 14 nickels 
</u>
checking this answer 
28 dimes = $2.8
14 nickels = .70
2.8+.7=3.5

3 0
4 years ago
Read 2 more answers
How many permutations can be made with the letters in the word Metallica
pentagon [3]
<h3>Answer:   90720 </h3>

===============================================

Explanation:

There are 9 letters in "Metallica", so there would be 9! = 9*8*7*6*5*4*3*2*1 = 362880 different permutations; however, this is only the case if we could tell the letters L and A apart.

We have two copies of each of those repeated letters, so we have to divide by 2!*2! = (2*1)*(2*1) = 4 to account for these repeats.

Because we can't tell the repeated letters apart, we really have (9!)/(2!*2!) = (362880)/(4) = 90720 different permutations.

5 0
3 years ago
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