Write it out as a set of equation:
Let x be number of 8 cent stamps, y be 10 cent stamps, and z be 2 cent stamps.
x=y
z=x+y
8x+10y+2z=440
Lets first solve for x:
from x=y and z=2x(from first equation) the last equation is
8x+10x+4x=440
22x=440
x=20
know that x=20, you also know that y=20 as well, since z=x+y, z=40.
So 20 8-cent stamps, 20 10-cent stamps, and 40 2-cent stamps.
Answer:
x=3/2
Step-by-step explanation:
2^2x=2^3
2x=3
x=3/2
Answer:350
Step-by-step explanation:
i did the same question
Answer:
300
Step-by-step explanation:
X^2=10×10=100
3×100=300
