4a-13=19 add 13 to both sides
4a=32 divide by 4 on both sides
a=8
50 * 3 = 150 and 150 * 3 = 450
So the answer is b 150
It simplifies to the proper fraction 14/15 so it cannot be a mix number
hope this helps !!
Subtract the second equation from double the first equation:
2x+6y-2x-(-4y)=0
10y=0
Therefore, y=0. Substituting this into the first equation, we see that:
x+3(0)=3
x=3
Therefore, x=3. The solution to this system is x=3, y=0, or (3, 0).
4+15+11+5+7+10= 50 cm
10cm was the missing one