Find the values of X and why in the following equation.

(x+yi)+(4+9i)=9-4i

The values of x and y are x = 5 and y = -13 ⇒ B

Step-by-step explanation:

If the complex numbers are A = (a + bi) and B = (c + di), then

A + B = (a + c) + (b + d)i

Let us solve the question

∵ (x + yi) + (4 + 9i) = 9 - 4i

→ Add the real parts and the imaginary parts on the left side

∵ x, 4 are the real parts, and y and 9 are the imaginary parts

∴ (x + 4) + (y + 9)i = 9 - 4i

→ Compare the two sides, and equate the like terms

∵ 9 is the real part and -4 is the imaginary part

∴ x + 4 = 9

→ Subtract 4 from both sides

∴ x + 4 - 4 = 9 - 4

∴ x = 5

∵ y + 9 = -4

→ Subtract 9 from both sides

∵ y + 9 - 9 = - 4 - 9

∴ y = -13

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)

the answer is 31.27mph