So for you can answering this your exercise question right,correct ,so you need learning the pythagora's theorem what about say ????
- in case of a right triangle the sum of the length squared of the two sides equal the length of hypotenuse squared
hope this will help you answering right your exercise question
Answer:
a = 
Step-by-step explanation:
Given
ai + bj and 5i - 2j are perpendicular and b = 3, that is
ai + 3j and 5i - 2j are perpendicular, then
The scalar product = 0 , that is
5a - 6 = 0 ( add 6 to both sides )
5a = 6 ( divide both sides by 5 )
a = 
Your answer should be, 3x= 22y to the tenth power...
If I could give you an answer, I would. But I'm terrible at Math so, sorry
A letter, which is how you name it. If that is what your asking, of course.