Answer:
Sarah bought 3 first class tickets and 3 coach tickets.
Step by Step Explanation:
1030+1030+1030=3850
380+380+380=1140
3850+1140=4230
Since the triangle is equilateral, all its angles are equal to 60°
AO is the bisector⇒∠OAD = 30°
AO is the hypotenuse, ∠OAD = 30°⇒
OD=5*2=10m
By the Pythagorean theorem
Answer: A) 
m²
P.S. Hello from Russia and sorry for my bad english :^)
Step 6 wants us to show two angles which are also two interior angles that are located on the same side.
Interior angles are angles that are INSIDE the parallel lines.
On the diagram given, there are two pairs of interior angles that are on the same side:
Angle VQT and angle ZRS
Angle UQT and angle WRS
Two interior angles on the same sides add up to 180°
The missing statement that would fit statement in Step 6 is:
m∠VQT + m∠ZRS = 180°
Answer: Second option
Answer To (b): 10 sandwiches in 20 minutes. But If Your Friend Arrived 10 Minutes Earlier, Then He Can Make 20 Sandwiches In The 20 Minutes That You Are There. If He Started When He Arrived And The Twenty Minutes Started Then, You Can Only Make 5.
