Answer:
Step-by-step explanation:
You could multiply all of equation A by 1/6 and all of equation b by -1/4 to get
A. x-3/2y=-1/3 and B. x+1/4y=/5/4, then subtract the equations from each other to solve
1+3/5-5/6=30/30+18/30-25/30=23/30
( 7 + 3i ) - ( 2 + 3i )
= 7 - 2 + 3i - 3i don't forget the adjictive inverse which is 3i - 3i = 0
so the final answer wil be 5
Answer:
A belt costs $15 and a wallet costs $27.
Step-by-step explanation:
Let's mark price of a belt with x and price of the wallet with y. That leaves is with a system of equations:
x + y = $42
7x + 4y = $213
The goal when solving this system is to get rid of one of the variables. We can do that by multiplying first equation with -4:
-4x - 4y = -168
7x + 4y = 213
Now, we simply add these two equations up:
-4x - 4y + 7x + 4y = -168 + 213
3x = 45
x = $15
Now, we plug in x into any of the two starting equations to find y:
x+y=42
15 + y = 42
y = $27
Answer:
Step-by-step explanation:
Given that both men moves at constant speed on the same trail, the motion equations that describes each motion are, respectively:
Man 1
Man 2
Where x is measure in kilometers and t in hours, respectively.
The time taken for both men to meet each other is: