Help me please. I don't understand how to do this

a. 781 meters

b. 319 meters

Step-by-step explanation:

by using the pythagorean theorem, a^2 + b^2 = c^2, you can find that 500^2 + 600^2 = the square root of 610000, which rounds to 781.

to find how much shorter it is, add 600 and 500 to get 1100, and subtract 781 from it. you get 319.

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.