So here you're solving a system of equations. If A=the number of strokes Abby has, B=the number of strokes Brenda has, and C=the number of strokes Charda has, then your equations would be:
A-4=(A+B+C)/3
(A+B)+8=3C
A+B+C=192
If we look carefully, you can see that (A+B+C) can be seen in two equations (the first and third). So you could use substitution with that.
A-4=(192/3)
A-4=64
A=68
So now you know that Abby has 60 strokes, you can substitute that into any of the other equations. I chose the second and got:
68+B+8=3C
B+76=3C
B=3C-76
If you substitute this and Abby's score into the third equation, you get:
68+(3C-76)+C=192
4C-8=192
4C=200
C=50 strokes
Answer:
y=2/3x+2
Step-by-step explanation:
8x-12y=-24
subtract 8x from both sides to come up with -12y=-8x-24
divide -12y by everything and get y=-8/-12x-24/-12
simplify and get y=2/3x+2
its all positive since a negative divided by another negative= a positive
Answer:
4.2 ×
Step-by-step explanation:
2.1 × × 2 ×
2.1 + 2 = 4.2
2 - 3 = - 1
4.2 ×
Answer:
+3
Step-by-step explanation:
(-m)^(-3) = -m^3, since (-1)^-3 = 1 / (-1).
If m = 2 then we have -2^(-3), or -1 / [2^3]), or -1/8.
Finally, if n = -24, the original expression becomes
(-1/8)(-24) = +3
Second problem: Only the first expression simplifies to a negative result.