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lisabon 2012 [21]
3 years ago
13

Need help with linear equations with substations

Mathematics
1 answer:
mezya [45]3 years ago
6 0
A way to solve a linear system algebraically is to use the substitution method. ... We can substitute y in the second equation with the first equation since y = y.
 
this is what i know about it
 
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A bookstore has a sale. When customers pay for 2 books, they get another book free. If Pay pays for a book of 16 books, how many
svetlana [45]

Answer:

16/ 2=8

after dividing you get 8

8+2=10

he gets 10 free books

and paid for 6

Step-by-step explanation:

hope this helps if not i'm sorry and good luck!

5 0
3 years ago
Clare spent a total of 25 minutes at the track. She spent 5 minutes stretching and walked 4 laps around the track. If she walked
andrezito [222]
Hello!

First of all, we can subtract the stretching time. This gives us 20. If we divide by the four laps we get 5 minutes per lap.

Now, one lap is 400 meters (most tracks are), which is equal to 15,748.03 inches. This means it takes her five minutes to walk 15,748.03 inches. This is also equal to 300 seconds, so it takes her 300 minutes per 15,748.03 inches. 

But if we round our big inches number to the nearest ten thousandth, we get 16,000, so in a simpler form her pace is 300/16,000. But we need to find in per second. Therefore we will divide by 300 to find how many inches she walks per second.  This means she walks about 53.33 inches per second.

I hope this helps!
6 0
3 years ago
Read 2 more answers
What - |3| math evaluate absolute value
EastWind [94]
The answer is -3, because the negative sign is outside of the absolute value. If the problem looked like this |-3|, then the answer would be 3. To clarify, your answer is -3.
7 0
3 years ago
Hii please answer really easy xx
dlinn [17]

Answer:

Step-by-step explanation:

find only for x or?

8 0
3 years ago
Write the first 4 multiples of 3/8
sesenic [268]

Multiples of 3

: 3, 6, 9, 12, 15, 18, 21, 24, ...

Multiples of 4

: 4, 8, 12, 16, 20, 24, ...

Multiples of 8

: 8, 16, 24, ..

2

Find the smallest number that is shared by all rows above. This is the LCM.

LCM = 2424

Method 2: By Prime Factors

1

List the prime factors of each number.

Prime Factors of 3

: 3

Prime Factors of 4

: 2, 2

Prime Factors of 8

: 2, 2, 2

2

Find the union of these primes.

2,2,2,32,2,2,3

3

Multiply these numbers: 2\times 2\times 2\times 3=242×2×2×3=24. This is the LCM.

LCM = 2424

3 0
3 years ago
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