Answer:
-2(9x-8)
Step-by-step explanation:
We are to simplify the expression -3.1x+7-7.4x-1.5x-6(x-3/2)
Open the parenthesis
-3.1x+7-7.4x-1.5x-6(x-3/2)
= -3.1x+7-7.4x-1.5x-6x+6(3/2)
= -3.1x+7-7.4x-1.5x-6x+9
Collect like terms
= -3.1x-7.4x-1.5x-6x+7+9
= -12x-6x+16
= -18x+16
= -2(9x-8)
Hence the simplified form of the expression is -2(9x-8)
Independent events are those events that do not affect each other in any way. Any change in one event will no have a corresponding change to the other one. Therefore, the independent events are:
<span>Roll a number cube, and then roll the same number cube again,
Flip a coin, and then flip the coin a second time.
Draw a card from a deck, replace it, and then draw a second card.</span>
(53 + 23) + 7 = 53 + (23 + 7) =53 + 30 = 83
Answer: A. 53 + (23 + 7)
It's Associative Laws (a + b) + c = a + (b + c).
Let the running time for movie b = x minutes
Running time for movie a = (x + 39) minutes
3x - (39 + x ) = 47 minutes
3x - x = 47 + 39 minutes
2x = 86 minutes, x = 43 minutes
So movie b runs 43 minutes
Movie a runs 43 + 39 = 82 minutes
