The answer is <span>
B: x+y=700
2x+4.5y=1200
</span>
<span>x - the number of student tickets sold,
y - the number of adult tickets sold
The total number of sold tickets is 700:
x + y = 700
</span><span>Adult tickets sold for $4.50 each and student tickets cost $2.oo each. If they took in a total of $1,200:
2x + 4.50y = 1200
The system of equations is:
</span>x + y = 700
2x + 4.50y = 1200
-1 is less than 0, so you use the first equation:
3(-1) +2 = -3+2 = -1
f(-1) = -1
For 0 use the 2nd equation:
3(0) + 4 = 0+4 = 4
f(0) = 4
For 2 use the 2nd equation:
3(2) + 4 = 6+4 = 10
f(2) = 10
Answer:
115.3 hertz
Step-by-step explanation:
For either interval, the value of the sample mean is given by the average of the lower and upper bound of the confidence interval. Since both intervals were constructed by using the same sample, both values should be equal.
For the first interval:
For the second interval:
Answer:
the answer is c
Step-by-step explanation:
