几道sat数学题1,Inthexy-coordinateplanewhatistheareaofthesquarewithoppositeverticesat(-2,-2)and(2,2)?2,QRPS是一个平行四边形.IfQR//PSinthefigureabove,whatisthevalueof2(x+y)?3,Inthexy-planeabove,theequationofl

Question

几道sat数学题
1,In the xy-coordinate plane what is the area of the square with opposite vertices at(-2,-2) and (2,2)?
2,QRPS是一个平行四边形.If QR//PS in the figure above,what is the value of2(x+y)?
3,In the xy-plane above,the equation of line l is x+3y=12.Which of the following is an equation of a line that is perpendicular to line
A) y=x+2.B)y=-3x+2.C)y=3x-6.D)y=X/3+6.E)-x/2-3
4,Five different points A B C D and E lie on a line in that order.The length of AD is4.5 and the length of BE is 3.5.If the length of CD is 2,what is one possible value for the length of BC?
5,When 1.783 is rounded to the nearest whole numbe,thr result is how much greater than when 1.783 is rounded to the nearest tenth?

Answer 1

16. 
since the coordinates of two apexes are (2,2),(-2,-2),we can easily know that the other two apexes' coordinates are (-2,2),(2,-2).therefore,we are supposed to calculate the area of a square with the length of side equals 4.4*4=16.


(seems that u didn't uploaded the picture...)

C
We can write the given line in this way:y=-1/3x+4,thus the slope of given line is -1/3.Two lines are perpendicular when the product of their slope is equal to -1.Therefore,the slope of another line should be (-1)/(-1/3)=3.

0The answer is evident if u draw out the picture.

0.2
1.783 rounded to the nearest whole number:2;
1.783 rounded to the nearest tenth:1.8;
2-1.8=0.2