Answer:
x = 4 and y = - 5
Step-by-step explanation:
note that the product of a complex number and it's conjugate is real
That is
(a + bi)(a - bi) where a, b are real
= a² - abi + abi - b²i²
= a² + b² ← a real number
For (4 + 5i)(x + yi) to be real
we require (x + yi) to be the conjugate of 4 + 5i , that is 4 - 5i
(4 + 5i)(4 - 5i) ⇒ x = 4 and y = - 5
Answer: 
Step-by-step explanation:
This is a multiplication problem. You are multiplying 
by 4. This also means 4 divided by 3. They are both the same.
Answer:
i think its The sale price of the jeans is 50% of the original price.
Step-by-step explanation:
Expression 1 is the main equation and expression 2 is the more simplified equation from expression 1.
326 + 37g
-287 - 23g
-----------------
38 + 14g
(Though I think 38 is suppose to be 39.)
X = 4/7 = 0.571 I believe so
