Answer:
$33
Step-by-step explanation:
55 divided by 5 is 11, so each shirt costs $11. So that means 3 shirts would be $33.
21 because 9+10 is actually 21
Answer:
The confidence interval for this proportion = (0.09, 0.13)
Step-by-step explanation:
Confidence Interval for Proportion =
p ± z ×√p(1 - p/n)
p = proportion = x /n
x = 71
n = 635
p = 71/635
p = 0.1118110236
p ≈ 0.1118
z score for 90% confidence interval = 1.645
Confidence Interval =
0.1118 ± 1.645 × √0.1118 (1 - 0.1118)/635
0.1118 ± 1.645 × √0.09930076/635
0.1118 ± 1.645 × √0.0001563791
0.1118 ± 1.645 × 0.0125051629
0.1118 ± 0.020570993
Confidence Interval =
0.1118 - 0.020570993
= 0.091229007
Approximately to the nearest hundredth ≈ 0.09
0.1118 + 0.020570993
= 0.132370993
Approximately to the nearest hundredth = 0.13
Therefore, the confidence interval for this proportion = (0.09, 0.13)
So 3. put it on x. but the negative numbers . then 4 put. 5 on y
A) I included a graph, look below.
B)
Input the y in x = y + 3.
x = (-4x - 3) + 3
x = -4x + 0
Add 4x to both sides.
5x = 0
Divide both sides by 5.
x = 0
Input that x value in y = -4x - 3
y = -4(0) - 3
y = 0 - 3
y = -3
(0, -3)
C)
Convert both equations to Standard Form.
x = y + 3
Subtract y from both sides.
x - y = 3
y = -4x - 3
Add 4x to both sides.
4x + y = -3
Add the equations together.
4x + y = -3
x - y = 3
equals
5x = 0
Divide both sides by 5.
x = 0
Input that into one of the original equations.
0 = y + 3
Subtract 3 from both sides.
-3 = y
(0, -3)