A periscope is a device that allows an observer on a submarine to search visually above the water when the submarine is submerged at a relatively shallow depth In a periscope, the mirrors are mounted parallel to each other as shown. Light rays enter the periscope from the right and strike the upper mirrorLight rays reflect from that mirror at the same angle at which they strike the mirror, so angle1 cong angle2 can you say about angle3 the angle at which the reflected light ray strikes the lower mirror?

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq

answer: median

step-by-step explanation:

the median is the middle value when a data set is ordered from least to greatest

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8