Answer:
100
Step-by-step explanation:
10(-2.5) = -25 since negative times positive is negative.
-25(-4)=100 since negative times negative is positive.
Basically, the negative inverts the sign so a negative negates a positive yielding a negative while a negative negates a negative yielding a positive.
Think of it as not not vs not
There is a 50/50 chance the next time he picks up a marble out of the bag it could be green, blue or red
Answer:
27 hours
Step-by-step explanation:
So t is going to represent time. $8t is equivalent to how much she makes for t amount of time. Being she is already down $16 for the gas, we have to take that into consideration that she must earn that back. Set up:
$8t - $16 = $200
Add like terms to get:
$8t = $216
Now solve for t by dividing both sides by $8.
t = 27 hours
The initial height of the tree = 7 ft
Each year the tree grows 6 in. 6 in = 6 / 12 = 0.5 ft
So the tree grows 0.5 ft every year.
After x years, the tree would have grown extra = 0.5*x =0.5x
So the height of the tree would be = Initial height + extra height grown
= 7 + 0.5x
h = 7 + 0.5x
Model is h = 7 + 0.5x,
where h = height of the tree in feet after x years.
Hope this explains it.
