Step-by-step explanation:
3 books /minute
how many books in 3 hours
3 hours= 180 minutes
540 books in 3 hours
in 5 hours=300 minutes
900 books in 5 hours
in n hours
180*n books in n hours
Answer:
D
Step-by-step explanation:
out of the choices
A) 2x-y=-2
3x+2y=-10
B) x+4y=3
2x+5y=3
C) 2x+3y=5
x-4y=-14
D) 3x+4y=15
x+y=5
only the system in D has a solution of x=5 and y=0
solve by substitution x+y=5 so x=5-y
plug into the other equation so 3(5-y)+4y=15
distribute 15-3y+4y=15 then minus 15 on both sides and combine like terms
so y=0 then put that value back into the other equation
so x+y=5 equals x+0=5 so x=5 this means the solution to the system of equations is the point (5,0)
Hope this helps! :)
Step-by-step explanation:
4x
__________
| |
x-3| | x-3
| |
|__________
4x
Add all sides together to get perimeter
2(4x)+2(x-3)=10x-6
Answer:
a=-36
Step-by-step explanation:
1/6(a+12)=-4
1) Distribute <u>1/6</u> to a and 12:
1/6a+2=-4
2) Subtract 2 from both sides:
1/6a=-6
3) Multiply both sides by the reciprocal of 1/6: (6/1)
a=-36
Let me know if you have any confusion on how I reached the solution :)
Answer:
0.68
Step-by-step explanation:
