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coldgirl [10]
3 years ago
9

Write a brief explanation on how to simplify radicals

Mathematics
1 answer:
MrMuchimi3 years ago
5 0
2 ways: make a little divide tree based on how many times you can divide it. Like you have sqrt88 you know it can divide by 2. So its 2 and 44, and 44 can be broken to 2 and 22, then 2 and 11. 11 can’t be divided anymore.

Now choose numbers that are the same and pair them together. These go outside the radicand. You had three 2’s and one 11. So a 2 would go on the outside and the remaining 2 and 11 would be multiplied leaved 2sqrt22.

Another way is to divide by the highest squared number. Taking sqrt88 again. 4 would be the highest squared number. So 88 would be 4 and 22, then 2 and 11. Since you have a 4 which is a perfect square you put that squareroot outside. The inside would remain the same because it wouldn’t break down into perfect squares or pairs anymore. So that would be 2sqrt22.

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How much warmer is 82 than -40
Otrada [13]

Answer: The difference between 82 and -40 is 122.

Step-by-step explanation:

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3 years ago
Increase £19028.42 by 19.5%<br> Give your answer rounded to 2 DP.
Triss [41]

Answer:

22738.96

Step-by-step explanation:

119.5% x 19028.42=

22738.9619

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6 0
3 years ago
Martin can run 1 mile in 7 minutes. What proportions can be written from this information?
jeka57 [31]

Answer:

\frac{1}{7}=\frac{3}{21}

\frac{7}{1}=\frac{21}{3}

Step-by-step explanation:

Verify each case

case 1) \frac{1}{7}=\frac{3}{21}

Multiply in cross and then compare both sides

1*21=7*3

21=21 ----> is true

therefore

Is a valid proportion

case 2) \frac{1}{21}=\frac{3}{7}

Multiply in cross and then compare both sides

7*1=21*3

7=63 ----> is not true

therefore

Is not a valid proportion

case 3) \frac{7}{1}=\frac{3}{21}

Multiply in cross and then compare both sides

21*7=1*3

147=3 ----> is not true

therefore

Is not a valid proportion

case 4) \frac{7}{1}=\frac{21}{3}

Multiply in cross and then compare both sides

3*7=1*21

21=21 ----> is true

therefore

Is a valid proportion

case 5) \frac{1}{7}=\frac{21}{3}

Multiply in cross and then compare both sides

3*1=7*21

3=147 ----> is not true

therefore

Is not a valid proportion

8 0
3 years ago
Read 2 more answers
Which expression gives the x-coordinate of the solution of the system?
Hatshy [7]
1) the x-coordinate of the system can be given as follow:
2x+3y = 5  (i)
3x+5y =7    (ii)
we  multiply (i) by 5 and (ii)  by 3, we have
 10x+15y = 25 (a)
  9x+15y =21   (b)
so (a) - (b) implies  x = 4,

2) We do the same method for
{2x + y = 2
{3x + 4y = -22,

and we found y = -10,
3) for the last one,
{5x + 4y = 2
{-2y = 8 + 4x
this system is equivalent to
{5x + 4y = 2  (i)
{4x + 2y = - 8  (ii)
so, multiply  (i) by 4 and (ii) by 5, and we have
20x + 16y = 8  (a)
20x +  10y = -40  (b)
elimination of x gives  6y = 48 then y= 8, we can find x fastly by replacing y=8 in (i), so 5x +4(8) =2, which implies  x= -6
finally the solution is S= {(-6, 8)}
 
 







7 0
3 years ago
The number of banks in a country for the years 1935 through 2009 is given by the following function.
Triss [41]

Answer:

24-x+Z-d=8XZ

Step-by-step explanatiohi you need to subtract and the add

7 0
3 years ago
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