C2H5OH:

Determine the value (in degrees) of angle y

RichyBlacK:

Two ships, A and B are moving at the same speed and begin moving at the same time. Ship A is to travel from point A1 (Latitude 40N, Longitude 30E) to point A2 (40N,30W), while ship B is to travel from point B1 (40S,20W) to point B2 (40S,40E).

Which of the following is true? (Choose all that apply):

A. Ship A will arrive before Ship B
B. Ship A will arrive after Ship B
C. Ship A and Ship B will arrive at the same time.
D. Ship A and Ship B will cover equal distances.
E. Ship A will cover more distance than Ship B.

davidylan:

y is 60 deg

~Sauron~:

y + 80 + 40 = 180
                 y = 180-(80 + 40)
                 y = 180-120
                 y = 60 degrees.

They have both covered 60(whatever the unit is).

RichyBlacK:

True, they both cover 60 degrees of longitude. There is one more correct option.

~Sauron~:

They will also arrive at the same time unless either of em blows a gasket.

C2H5OH:


Given x = 60.  Figures below have not been drawn to scale.
The perimeter of triangle ABC is how much more when compared to the perimeter of triangle DEF?

C2H5OH:


Given x = 60.  Figures below have not been drawn to scale.
The perimeter of triangle ABC is how much more when compared to the perimeter of triangle DEF?

jay bee:

If you have 3 bulbs in a room and the 3 switches are outside the room. how would you know the switch that controls what bulb? Note, you are only allowed to enter the room once.

~Sauron~:

Y has no value?
I know the perimeter of ABC is 24 cm. I need to know at least one angle in DEF to determine the perimeter.
Is it an isoceles triangle or equilateral?

C2H5OH:

A square paper with sides of 4-in each is rolled up to form a cylinder.
What's the volume of the cylinder formed?

a. 2pi
b. 16/pi
c. 4pi
d. 4/pi
e. 16

RichyBlacK:

Label the switches: 1, 2 and 3

Switch 1: Leave it alone
Switch 2: Switch it on for some time and then switch it off
Switch 3: Switch it on.

Enter the room:
Switch 3 controls the bulb currently on
Switch 2 controls the bulb that is off but warm
Switch 1 controls the bulb that is off but cool

davidylan:

i think its an isoceles triangle. You dont need any angles in triangle DEF. Since there are two equal angles (y) then there are 2 equal sides (10).

RichyBlacK:

Area of ABC = 16*SQRT(3)

Area of DEF = 8*SQRT(6)

~Sauron~:

Nah. . . . . . . . Incorrect!

RichyBlacK:

The areas are not equal, but the perimeters are equal as David pointed out. Correct!

davidylan:

he asked for perimeters not area.
your brain is working overtime!