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damaskus [11]
3 years ago
7

Simplify the expression: 2√ 20  −  3√ 7  −  2√ 5 +  4√ 63 .

Mathematics
2 answers:
marshall27 [118]3 years ago
7 0
2 sqrt20 - 3 sqrt7 - 2sqrt5 +4 sqrt63

= 4 sqrt5 - 3 sqrt7 - 2 sqrt5 + 12 sqrt7

= 2 sqrt 5 + 9 sqrt 7


Its C
Masteriza [31]3 years ago
4 0
2√20 - 3√7 - 2√5 + 4√63

4√5 - 3√7 - 2√5 + 12√7

2√5 + 9√7

:)
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The Blazers hockey team has won 7 of its first 12 games.
Step2247 [10]

Answer:

The Rockets' team has the better record.

Step-by-step explanation:

  • The Blazers hockey team has played 12 games but they won only 7 out of the 12 games, so that means that they loss the other 5 games. So that makes the Blazers record 7 wins and 5 losses.

  • The Rockets' team has played 8 games but they won only 5 out of the 8 games, so that means that they loss the other 3 games. So that makes the Rockets' record 5 wins and 3 losses.

  • So, the Rockets' team has the better record because they loss less games than the Blazers team did.
4 0
4 years ago
the gasoline gauge on a van initially read 1/8 full. When 15 gallons were added to the tank the gauge read 3/4 full. How many mo
Nostrana [21]
So 15 gallons of gas brought it from 1/8 full to 3/4 full.

Let's change 3/4 to the equivalent fraction 6/8  so that the denominators are the same.    (3/4 = 6/8)

So 15 gallons of gas brought it from 1/8 to 6/8   Those 15 gallons must be 5/8 of the tank's capacity   6/8 - 1/8 = 5/8

So 15 is 5/8 of what number?  (This will tell us the capacity of the whole tank)

15 = 5/8n
Divide both sides by 5/8 (remembering to multiply by the reciprocal 8/5)
15 ÷ 5/8  = 15 x  8/5  = 18

So the tank holds 24 gallons and (since it is 3/4 full or has 18 gallons) it needs 6 gallons to fill the tank.

Check - at first  1/8 full (1/8 of 24 = 3)  So we started with 3 gallons. 15 gallons added to the 3 gallons is 18 gallons.  Now the tank is 6/8 (3/4 full).  The remaining 1/4 (2/8) of a tank is the difference between 18 and it's capacity (24 gallons)  so it will need 6 gallons to fill it up..

3 0
3 years ago
Please answer this question, ONLY IF YOU KNOW THE ANSWER. No guessing, 20 points and brainliest!
Anika [276]

B. 3. Because if you have two people rolling a six sided die, with odd and even number contributions, you would divide 6 by 2. This is because there are TWO people going for TWO different types of numbers, odd and even. 6/2 gives us 3.


Hope this helps :)


6 0
3 years ago
What is the LCD of 2/7 and 9/10
Ksenya-84 [330]
Assuming LCD means Lowest Common Denominator
Assuming by "and" you mean adding the two

Well, you go by the multiples of 7;
7, 14, 21, 28, 35, 42, 49, 56, 63,<u> 70</u>
Multiples of 10;
10, 20, 30, 40, 50, 60, <u>70</u>, 80, 90, 100

Straight away you can see the lowest common multiple is 70,

Now to go about adding them,
2/7 * 10 (both sides) , 20/70
9/10 * 7 (both sides) , 63/70

Then you add the two; 20/70 + 63/70  - now we can add them because they share the same denominator
20/70 + 63/70 = 83/70 = 1 whole 13/70 (simplified)

<u>The LCD is 70

Quick tip, </u>to find a common multiple (not necessarily the lowest) multiply the two denominators. 
8 0
4 years ago
Read 2 more answers
Soooooooooo no ones gonna help me with my paper? ight lol
scZoUnD [109]

Answer:

Which paper?...LOL...

8 0
3 years ago
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