数学题目!!!快快快快快快快快快快快(有3题)
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发布时间：2023-11-06 12:43
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热心网友
时间：2024-02-18 15:23
王花占15%
白花占18%.三种颜色的花共有116朵.其他颜色的花有多少朵????(答案加请详细列出) 红花占25%
王花占15%
白花占18%﹐共占58% 所以其他颜色的花有116/58%=200朵 2.A
B
C三人共有8200元
A有的是B的40%
B有的是C有的75%
C有多少元?(请详细列出) 设C有x元﹐则B有0.75x元
A有0.75*0.4x=0.3x元 因为A
B
C三人共有8200元 x+0.75x+0.3x=8200 2.05x=8200 x=4000 C有4000元 3.糖一盒
吃去25%
吃去的刚好是余下的40%小5粒
问这盒糖原有多少粒?(请详细列出) 设这盒糖原有x粒 吃去25%﹐即吃去0.25x 余下0.75x 按题意 0.25x=0.75x*0.4-5 0.25x=0.3x*-5 5=0.05x x=100 这盒糖原有100粒 2006-12-01 01:14:28 补充： 打错佐第1题是所以花的总数是116/58%=200朵其他颜色的花有200*(1-58%)=84朵
Question 1: 116/ (25%+15%+18%) x (1 - (25%+15%+18%)) = 200 x 42% = 84 === Question 2: Suppose C have $Y
then 40%x75%xY + 75%xY + Y = 8200 0.3Y + 0.75Y + Y = 8200 Y (0.3 + 0.75 + 1) = 8200 Y = 8200 / (0.3 + 0.75 + 1) Y = 4000 ==== Or you can simply write the formula as follow: 8200 / (40%x75% + 75% + 1) = 8200 / (0.3 + 0.75 + 1) = 4000 ==== Question 3: Suppose this box of candy has Ypcs
then 40%(1 - 25%)Y - 25%Y = 5 40%(75%)Y - 25%Y = 5 Y (0.3 - 0.25) = 5 Y = 5 / (0.3 - 0.25) Y = 100 === Or you can simply write the formula as follow: 5 / (40%(1 - 25%) - 25%) = 5 / (0.3 - 0.25) = 100 ===
1) 设花园里共有的花是 Z Z x (25%+15%+18%) = 116 Z x 25% = 116 Z = 464 因为三重花共有116朵 所以其他颜色的花是 464 - 116 =348 2) 设C有 Z 元 8200 = Z + Z x 75% + Z x 75% x 40% 8200 = Z(1+75%+30%) 8200 = Z(205%) Z = 8200 除以 205% Z = 4000 所以 C 有4000元 3) 设一盒糖有 Z 粒糖 {(1-25%) x 40%}Z - 5 = (25%)Z (30%)Z - 5 = (25%)Z (30%)Z - (25%)Z = 5 (5%)Z = 5 Z = 5 除以 5% Z = 100 所以一盒糖有 100 粒
1. 116 / (15%+25%+18%) =200 200-116= 84 2. let c be x b = 0.75x a = 0.4(0.75x) = 0.3x x + 0.75x + 0.3x = 8200 x = $4000 3. let这盒糖原有x粒 吃去的=0.25x 余下的=0.75x 0.25x = 0.4(0.75x)-5 0.05x=5 x = 100粒
1. Let R
Y and W be the Red
Yellow and White flower
and x be the total number of flowers R+Y+W=0.25x+0.15x+0.18x=116 0.58x=116 x=200 其他颜色的花有200 - 116 = 84朵 2. A=0.4B B=0.75C A+B+C=8200 0.4B+B+C=8200 1.4B+C=8200 1.4(0.75C)+C=8200 1.05C+C=8200 2.05C=8200 C=4000 3. let y be the total number of sweets 0.25y = 0.4 x (1-0.25)y -5 0.25y = 0.4x0.75y -5 0.25y = 0.3y -5 5 = 0.3y-0.25y 5 = 0.05y y = 100 这盒糖原有100粒
