Answer:
-2 and .66666
Step-by-step explanation:
2(3x^2+4x-4)=0
2(3x^2+6x-2x-4)=0
2(x+2)(3x-2)=0
x=-2, .6666
Answer:
= 8.5 hours
= 8 hours 30 minutes
Step-by-step explanation:
Full time spent = 100%
If 40% = 3.4 hours ,
What about 100% = ?
= (100 x 3.4) ÷ 40
= 340 ÷ 40
= 8.5 hours
PEMDAS is very helpful. Without pemdas, people solve equations differently. For example, 2 + 3 * 2. Using pemdas, we knoow 2 + 3 * 2 = 8
However, without pemdas, someone could do 2 + 3, which is 5, then *2. Which would get 10.
PEMDAS is important to keep order.
Simplify:
3x + 4[2x -3x -3 -20x] = 25x +100
3x + 4(-21x -3) = 25x + 100
3x - 84x -12 = 25x + 100
-81x -12 = 25x + 100
Add 12 and Subtract 25x from each side
-106x = 112
X = -112/106
X = -56/53
^^^^^^^^^^
Final Answer^^
