第一道：if the length of one of the legs of a right triangle is decreased by 10%,and the length of the other leg is increase by 20%,then what is the approximate percent change in the area of the triangle?第二道：if m is a positive integer,and

第一道：if the length of one of the legs of a right triangle is decreased by 10%,and the length of the other leg is increase by 20%,then what is the approximate percent change in the area of the triangle?第二道：if m is a positive integer,and 一道SAT数学题,OG上的,The figure above shows part of a circle whose circumference is 45.If arcs of length 2 and length b continue to alternate around the entire circle so that there are 18 arcs of each length ,what is the degree measure of each SAT数学真题if the length of LM is 7 and the length of MN is 8,which of the following could be the length of LN(LM MN LN are vectors)ANS:14 英语翻译the length of rectangle is three more than twice its width.find the length and width of the rectangle.if its perimeter is 84cm. 第,一条;;It is given that the scale of a map is 1:250000.It the length of a railway line on the map is 121cm ,find its actual length in km 第二条;;the figure shows a scale drawing of a pyramid.(a)Express the scale in the fram 1 cm:n mm(B) If th 一道物理题..关于凹凸透镜的A convex mirror produced an image that is 3.0 cm behind the mirror.If the focal length of thismirror is 5.0 cm,at what distance from the mirror is the object placed? 下面这道题怎么样做啊the length of a rectangle is four times its width.if the perimenter is 60cm,what are the length and the width? the width of a rectangle is 7 cm shorter than the length .if the perimeter of the rectangle is 38 cm ,find(a) the width(b) the length(c) the area of the rectangle 一道英语数学题求解!～急着!Find the width of a rectangle if its perimeter is 336 centimeters and its width is 14 centime- ters less than its length If the perimeter of a rectangle is 40cm ang its length is x cm ,then the width is what? The figure above shows part of a circle whose circumference is 45.if arcsof length 2 and length b continue to alternate around the entire circle so that there are 18 arcs of each length ,what is the DEGREE measure of each of the arcs of length 要图 we put a copper wire to wind around the ciecle whose diameter is 30 cm ,just can be wound 12 rings,can you work out the length of the copper?if the perimeter of a rectangle and a square is equal ,if the length of the square is 3.5dm,the length of rec p417 12Five different points A,B,C,D and E lie on a line in that order.The length of AD is 4.5 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? What is the length of this ruler? 一道GMAT的题目.我很无语Q11:A rectangular picture is surrounded by a boarder, as shown in the figure above. Without the boarder the length of the picture is twice its width. If the area of the boarder is 196 square inches, what is the lengt length of Length of 请问一道英文版的数学题~the number of 0.25-inch lengths in a 4-inch length.请问1.2...