Step 1. Factor out the common term 2
n - 2 = 2(5n + 2)/2
Step 2. Cancel 2
n - 2 = 5n + 2
Step 3. Subtract n from both sides
-2 = 5n + 2 - n
Step 4. Simplify 5n + 2 - n to 4n + 2
-2 = 4n + 2
Step 5. Subtract 2 from both sides
-2 - 2 = 4n
Step 6. Simplify -2 - 2 to -4
-4 = 4n
Step 7. Divide both sides by 4
-1 = n
Step 8. Switch sides
n = -1
Answer:
Step-by-step explanation:
Left hand side is a positive number. Right hand side is positive. The equation should have real roots. (worst case, the root would be complex, but let's not open that can of worm)
Let's start noticing that and then take the square root of both sides, remembering that we need to take a plus or minus sign ( both a and -a squared give the same result!)
hey is this all too then question
Answer:
The number of cds to be sold to hit a weekly revenue of 1000 pesos is 25
Step-by-step explanation:
Here, we have the revenue function and we want to know the number of cds to be sold to hit a particular revenue value.
Mathematically from the question;
r = 2x^2 - 10x
in the question; r = 1000
so ;
2x^2 - 10x = 1000
divide through by 2
x^2 -5x = 500
so;
x^2 -5x -500 = 0
x^2 -25x + 20x -500 = 0
x (x -25) + 20(x -25) = 0
(x -25)(x + 20) = 0
x -25 = 0 or x + 20 = 0
x = -20 or 25
Since the number of cds cannot be negative, we only select x = 25 as the correct answer
Answer: x= 25
Angles = 45, 60, 75
Step-by-step explanation:
(X+20) +3x+60 = 180
(X+20)+3x= 180-60= 120
X+20+3x= 120
X= 25
25 + 20=45
25*3= 75