Answer: -x^2-2x+1
Step-by-step explanation:
2-(x+1)^2=2-x^2-2x-1=-x^2-2x+1
Answer:
a) d(t) = 360 - 60t
Step-by-step explanation:
In this problem, the initial distance between Joe and Dallas is
d0 = 360 miles
Later, Joe travels at a speed of 60 miles/hour.
This means that the distance covered by Joe in a time t is
x(t) = 60t
where t is the time measured in hours.
However, Joe is moving towards Dallas: this means that the distance from Dallas is decreasing as time increases, therefore the distance is decreasing at a rate of
-60t
And therefore, the final expression of Joe's distance from Dallas is
d(t) = 360 - 60t
In fact, we notice that at t = 0, the distance from Dallas is 360 miles.
The correct option is A.
One of the basic feature of an experiment is the selection of participants by means of random method. It is very important to select participants randomly in order to avoid experimental bias that may occur as a result of the participants not been an exact representation of the concerned population.
Answer:
After 18 years, Zach's account balance will be $ 6,614.66.
Step-by-step explanation:
Given that Zach's parents put $ 1,500 in her bank account for college tuition at an interest rate of 8.25% compounded weekly, to determine what will be the balance after 18 years the following calculation must be performed:
1,500 x (1 + 0.0825 / 52) ^ 18x52 = X
1,500 x 1.00158653 ^ 936 = X
6,614.66 = X
Therefore, after 18 years, Zach's account balance will be $ 6,614.66.
Answer:
Missing length = 20
Step-by-step explanation:
Ratio is 16/20=4/5
25×4/5=20