Math shortcuts help me plz

<p>Okay here's some questions I want some of you to solve for me if you could do so please</p>

<p>1) If -1 less than or equal to x less than or equal to 3, which of hte following inequalities describes the set of all possible values of x squared?</p>

<p>A) -1 less than or equal to x squared less than or equal to 3
B) 0 less than or equal to x squared less than or equal to 9
C) 1 less than or equal to x squared less than or equal to 3
D) 1 less than or equal to x squared less than or equal to 6
E) 1 less than or equal to x squared less than or equal to 9</p>

<p>2) You have a right triangle looking figure but the angle is not 90 degrees, this angle is greater than 90 degrees. Why is the hypotenuse^2 greater than (leg1)^2 + (leg2)^2?</p>

<p>3) In the xy-coordinate plane, the coordinates of two opposite vertices of a square are (3,4) and (6,7). What is the sum of the x-coordinate and the y-coordinate of another vertex?</p>

<p>4) You have a right angle, which is made up of subangles x and y. therefore x+y=90</p>

<p>if 2y<x<3y, what is one possible value of y and why?</p>

<p>Please help me, as these took me a couple of minutes of backsolving/strategic guessing/etc to do them.</p>