The answer for your problem is B.
Answer:
C.
Step-by-step explanation:
(x+yi)+(4+9i)=9-4i
x+yi+4+9i=9-4i
x+4+yi+9i=9-4i
Comparing the real and imaginary part we get:
x+4=9 OR y+9=-4(imaginary portion)
x=9-4 OR y=-4-9
x=5 OR y=-13
Answer:
a
Step-by-step explanation:
m*m= m^2
-15*2=-30
-15m+2=-13m
Area for question 1 is the equation (HxB)÷2 or 1/2BxH (that is how you find the area of a triangle.
To work out the Perimeter of the triangle you need to work out the value of each outter side. to work this out you need to use the equation a²+b²=c² where the value of c is the longest side in the right-angled triangle
1A) 22.5 inch²
1P) 5²+4.5²=c² = 25+20.25=c² = 45.25=c²
c=√45.25 = 6.73(2DP). The perimeter of this triangle is Base+2C which is 9+(6.73x2) = 9+13.46=22.46 inch
2A) 11x12=132÷2=66 inch²
2P) 11+12+13=36 inches