Answer:y
=
2
,
2
x
−
y
=
−
1
x
+
2
y
=
4
,
x
−
y
=
−
3
x
−
y
=
9
,
x
+
y
=
6y
=
2
,
2
x
−
y
=
−
1
x
+
2
y
=
4
,
x
−
y
=
−
3
x
−
y
=
9
,
x
+
y
=
6y
=
2
,
2
x
−
y
=
−
1
x
+
2
y
=
4
,
x
−
y
=
−
3
x
−
y
=
9
,
x
+
y
=
6
Step-by-step explanation:
Answer:

Step-by-step explanation:
Look at the picture.
ΔABC and ΔDBA are similar (AA). Therefore the sides are in proportion:

We have

Substitute:
<em>cross multiply</em>

Answer:
Option D
Step-by-step explanation:
<u><em>Using Unitary Method:</em></u>
10 rotations = 1 minute
=> 1 rotation = 1/10 minute
Multiplying both sides by 43.5
=> 43.5 rotation =
minutes
=> 43.5 rotation = 4.35 minutes
Answer: 0.8313
Step-by-step explanation:
As per given we have,

Also, the distribution of the number of suitcases that get lost each week on a certain route is approximately normal.
Since , 
z-score corresponds to x= 10:
z-score corresponds to x= 20:
P-value = 

Hence, the probability that during a given week the airline will lose between 10 and 20 suitcases = 0.8313