Let
x------------> <span>the flags length
</span>y------------> the flags <span>width
P----------> perimeter
we know that
p=2x+2y------> 2x+2y=560----------> equation 1
and
x=y+40-------------> equation 2
</span> substitute 2 in 1<span>
2*(y+40)+2y=560-----------> 2y+80+2y=560--------> 4y=480------> y=120
x=y+40-------> 120+40----------> x=160
the answer is
</span>
the flags length is 160 ftthe flags width is 120 ft
Part 2) Write three
situation to which you could apply the resulting system of equations 1) It can be used when considering the relationship between the price of a product and the quantities of the product that people want to buy at a certain price.
2) It can be used to determine the speed, distance and time duration when traveling by car, and you want to know the values of the unknown variables in your trips.
3) It can be used to determine the most convenient loan option to buy a car or a house when considering the duration of the loan.
Answer:
as in what class period are you so for example
period 1:math etc
Answer:
7/16
Step-by-step explanation:
There are a total of 32 marbles. Of these marbles, 14 are not blue. So the probability is 14/32, or 7/16.
Answer:
x=\sqrt{30}
Step-by-step explanation:
Answer:
Not reasonable.
Step-by-step explanation:
Hello!
You have two samples from normally distributed variables. Let's say:
Sample 1
X[bar]₁= 485.6
S₁= 44.3
n₁= 49
Sample 2
X[bar]₂= 390.1
S₂= 61.3
n₂= 31
A Student-t distribution is graphically almost identical to a normal distribution. This distribution is defined as:
Where Z is variable with normal distribution and V is a variable with chi-square distribution and Z and V are independent variables.
This is the reason why the distribution looks so much like a normal distribution and, as the sample sizes grow, it tends to be identical to the normal distribution.
Depending on the criteria of the statistics course you are taking, it is the sample size from which you stop choosing to use the student's t and you start using the normal distribution. In general, with n greater than 20 or 30 the normal approximation is already used.
Applying these criteria, since n₁ and n₂ are bigger than 30 I wouldn't recommend using the pooled t-test.
I hope it helps!