Answer:
Step-by-step explanation:
a 4x/5-3=12
4x/5=15
4x=75
x=75/4
b u could have done times 5 first
4x-3=60
Answer:
A = 5 / P
Step-by-step explanation:
5 / A = P
A = 5 / P
Subtraction is "addition of the opposite."
8 - 9 = 8 + (-9)
-7 - 2 = -7 + (-2)
-6 - (-3) = -6 + 3
Answer: 125lb < M < 155 lb
Step-by-step explanation:
The mean mass is 140 lb, and the deviation must be less than 15 pounds (exactly 15 is not accepted).
Then (140lb + 15lb) is not alowed, and (140lb - 15lb) is not alowed.
Then we can define M = mass.
We have the two equations:
M < 140lb + 15lb
M < 155lb
And
M > (140lb - 15lb)
M > 125lb
If we write these two relations togheter, we get:
125lb < M < 155 lb