a*****g
发帖数: 1320 | 1 麻烦给出解题步骤，万分感谢！
1. Butch can assemble 6 patio tables per hour. Jose can assemble 4 patio
tables per hour. How many hours will it take them working together to
assemble 60 tables?
2. How many 5% maple syrup and water mixture must be added to 100% pure
maple syrup to produce 5 quarters of syrup that is 10% maple syrup?
3. Oscar wants to fill a pond that irrigates his crops. One water source
fills the pond.1.5 times faster than a second source. When both sources are
used together, the pond is filled in 6 hours. Which equation describes how
fast both sources can fill the pond together?
1/r+2/3r=1/6
1/r-3/2r=1/6
6=1.5r+r
6=r + ½ r |
p**s
发帖数: 2707 | 2 1. How many tables they can assemble in one hour?
2. How many water needed in the 10% maple syrup?
3. How much of the pond can be filled in one hour? |
a*****g
发帖数: 1320 | 3 Please help!!! Thank you!
【在 p**s 的大作中提到】
: 1. How many tables they can assemble in one hour?
: 2. How many water needed in the 10% maple syrup?
: 3. How much of the pond can be filled in one hour?
|
h******u
发帖数: 1431 | 4 1,60/(4+6)=6
2,need syrup totally: 5*0.1=0.5
0.5=x*0.05+y
5=x+y
=>x=4.5/0.95, y=5-x
3,1/r+2/3r=1/6
patio
source
are
how
【在 a*****g 的大作中提到】
: 麻烦给出解题步骤，万分感谢！
: 1. Butch can assemble 6 patio tables per hour. Jose can assemble 4 patio
: tables per hour. How many hours will it take them working together to
: assemble 60 tables?
: 2. How many 5% maple syrup and water mixture must be added to 100% pure
: maple syrup to produce 5 quarters of syrup that is 10% maple syrup?
: 3. Oscar wants to fill a pond that irrigates his crops. One water source
: fills the pond.1.5 times faster than a second source. When both sources are
: used together, the pond is filled in 6 hours. Which equation describes how
: fast both sources can fill the pond together?
|
a*****g
发帖数: 1320 | 5 太感谢了，终于遇上好人了， 麻烦您再帮忙解以下3题。文科老妇女跪谢！
4. The Oxnard Juice Works makes a mango fruit drink from two types of
mangoes. One type costs $3.5 per gallon and the other costs $4.25 per gallon
. How many gallons of each are needed to make 100 gallons of juice that cost
$4.00 per gallon?
1) 25 gallons of $3.5 juice and 75 gallons of $4.25 juice.
2) 40 gallons of $3.5 juice and 60 gallons of $4.25 juice.
3) 331/3 gallons of $3.5 juice and 66/ 2/3 gallons of $4.25 juice.
4) 50 gallons of each type of juice
5. Calandra checks 50 processors in 2 hours. Krystal takes 3 hours to
check 45 processors. How many hours will it take from them to check 100
processors together?
2.5 hours 3.5 hours 5 hours 2 hours
6. Pablo needs to produce 10 liters of a 15% solution from 10% and 25%
solutions. How many liters of 10% solution does he need?
6 2/3 L 5 L 3 1/3 L 1L
【在 h******u 的大作中提到】
: 1,60/(4+6)=6
: 2,need syrup totally: 5*0.1=0.5
: 0.5=x*0.05+y
: 5=x+y
: =>x=4.5/0.95, y=5-x
: 3,1/r+2/3r=1/6
:
: patio
: source
: are
|
p**s
发帖数: 2707 | 6 5. 跟第一题一样
4,6. 鸡兔同笼问题，如果列方程，跟第二题一样
你就是要抄答案，也得弄明白再抄吧
gallon
cost
【在 a*****g 的大作中提到】
: 太感谢了，终于遇上好人了， 麻烦您再帮忙解以下3题。文科老妇女跪谢！
: 4. The Oxnard Juice Works makes a mango fruit drink from two types of
: mangoes. One type costs $3.5 per gallon and the other costs $4.25 per gallon
: . How many gallons of each are needed to make 100 gallons of juice that cost
: $4.00 per gallon?
: 1) 25 gallons of $3.5 juice and 75 gallons of $4.25 juice.
: 2) 40 gallons of $3.5 juice and 60 gallons of $4.25 juice.
: 3) 331/3 gallons of $3.5 juice and 66/ 2/3 gallons of $4.25 juice.
: 4) 50 gallons of each type of juice
: 5. Calandra checks 50 processors in 2 hours. Krystal takes 3 hours to
|
a*****g
发帖数: 1320 | 7 谢谢了。正在较劲脑汁中。。。
【在 p**s 的大作中提到】
: 5. 跟第一题一样
: 4,6. 鸡兔同笼问题，如果列方程，跟第二题一样
: 你就是要抄答案，也得弄明白再抄吧
:
: gallon
: cost
|
w**f
发帖数: 7794 | 8 你也太文科了...
gallon
cost
【在 a*****g 的大作中提到】
: 太感谢了，终于遇上好人了， 麻烦您再帮忙解以下3题。文科老妇女跪谢！
: 4. The Oxnard Juice Works makes a mango fruit drink from two types of
: mangoes. One type costs $3.5 per gallon and the other costs $4.25 per gallon
: . How many gallons of each are needed to make 100 gallons of juice that cost
: $4.00 per gallon?
: 1) 25 gallons of $3.5 juice and 75 gallons of $4.25 juice.
: 2) 40 gallons of $3.5 juice and 60 gallons of $4.25 juice.
: 3) 331/3 gallons of $3.5 juice and 66/ 2/3 gallons of $4.25 juice.
: 4) 50 gallons of each type of juice
: 5. Calandra checks 50 processors in 2 hours. Krystal takes 3 hours to
|
a*****g
发帖数: 1320 | 9 这些题我小时候也会做的，现在老了：（
你能不能解释下1/r+2/3r=1/6 那题？谢谢。
+
【在 w**f 的大作中提到】
: 你也太文科了...
:
: gallon
: cost
|
y****i
发帖数: 12114 | 10 r means rate
one rate is 1.5 times of another rate, so one rate is r and the other rate
is 1.5r,
and if both work together, it takes 6 hours to fill the pond, therefore
1/r+1/1.5r=1/6
since 1.5=3/2, then 1/1.5=2/3
therefore, 1/r+2/3r=1/6 |
