Answer:
-2x + 12
Step-by-step explanation:
If we call our other expression y, we can set up an equation tying together 3x + 5, y, and 5x - 7:
Solving for y by subtracting 5x - 7 from both sides will get us the expression we're looking for:
So the other expression in the sum is -2x + 12.
Answer:
It is a combination answer
495 ways
Step-by-step explanation:
In this question, we are tasked with calculating the number of ways in which a manager can select 4 people out of 12 for the Sunday evening shift.
Firstly, the question talks about selecting a particular number from a mix, this is a combination question since the key word SELECT is mentioned.
Now, how do we go about it? To select a partial number from a mix , we use the combination formula as stated.
Mathematically, say we are selecting a number r from a total of numbers n, the number of ways we can do this is nCr = n!/(n-r)!r!
In this case however, we are simply selecting 4 out of 12
Our combinational equation thus becomes 12C4 = 12!/(12-4)!4! = 12!/8!4! = 495 ways
Answer:
D
Step-by-step explanation:
Given
- + 2 > 4 ( subtract 2 from both sides )
- > 2 ( multiply both sides by 14 to clear the fraction )
- x > 28
Multiply both sides by - 1, reversing the symbol as a result of multiplying by a negative quantity.
x < - 28 → D
Answer:
x=1
Step-by-step explanation:
simplify everything
3x-3-4x+2=8x-8
-1x-1=8x-8
add 1x on both sides
1=9x-8
+8
1+8=9
9/9=1