First question
1:C 2:D 3:B 4:D
second question
0-2+5
Answer:
AED 50$
Step-by-step explanation:
8 pencil * 3 +5 pens *6
8 + 5i. I just added the expression normally.
Factor x^4-y^4: (x²+y²)(x²-y²)
further factor: (x²+y²)(x+y)(x-y)
so the dimensions are (x²+y²)(length), (x+y) (width), and (x-y) (height)
Area of one blade is
A=(1/2)b*h=(1/2)7*4=28/2=14
for four blades
14*4=56
