Huilan's age is two times Thomas's age. The sum of their ages is 27. What is Thomas's age?

9

Step-by-step explanation:

27/3 = 9

9x3=27

Thomas is 9

Hulian is 18 years old and Thomas is 9 years old.

Step-by-step explanation:

So if the sum of their ages is 27, you can kind of just sub various numbers in until they create the desired sum.

In this case, since Hulian is two times Thomas' age which would equate to 3 different numbers. 27 is divisible by 3, which gives you the quotient 9.

You can create the equation:

2x + x = 27

3x = 27

x = 9

Then check the answer by subbing the number into the equation and seeing if it meets the requirements (is Hulian two times Thomas's age?).

2x = 2(9) = 18

x = 9

9 x 2 = 18

So Hulian would be 18 years old and Thomas would be 9 years old.

0.85 or 85%

step-by-step explanation:

1) divide 23 by 27

2) round the decimal to the nearest 10

3) so your answer would be 0.85 or 85%

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225