Given

first, convert

to base 25 to match the other term.



Substitute above identity into original equation:

Use substiution

above equation becomes
2/u-3u=1
multiply by u and solve for u:

=> u=2/3 or u=-1
case A:. u=2/3 =>

=>

case B: u=-1 =>
which does not give a real solution, so reject.
See graph below for confirmation of solution.
Answer:
-3
Step-by-step explanation:
First, we have to do -9 + 6.
The order of addition does not matter, so we can switch around the numbers, making the statement:
6+ (-9)
If this is the equation, we can cancel out the addition sign:
6-9
Now we have to subtract 9 from six, and we will get -3.
x = -3
<u>Answer</u> : The demonstration is below :)
Step-by-step explanation :
<u>We use Pythagoras' </u><u>theorem </u><u>:</u>
- In the triangle ABC we have :
AB² = AC² - BC² = 15² - 9² = 144 = 12²
- In the triangle ABD we have :
DB² = AD² - AB² = 13² - 12² = 5²
cos(a) = BD/AD = 5/13
Answer:
$512
Step-by-step explanation:
SUBTRACT THE BIGGEST AND THE SMALLEST #