Question 294642: A rose bush costs x dollars. A lilac bush costs $2.50 less than a rose bush. How much does a lilac bush cost, in dollars? ( this is algebra explore addition & subtraction expressions. Can you please explain how to do these problems, I'm a mom who is not good at math trying to help her 5th grader!!)
The troop has x bushes to plant. They have already planted 8 bushes. How many bushes do they still have to plant?
(# of rose bushes 5 6 7 8 9 )
Answer by mananth(16946)   (Show Source):
You can put this solution on YOUR website! yAlgebra is all about unknown quantities.
They can be expressed as alphabets, x , y , a, b . They are called variables.
If i say I have x apples. Then i may have 1 or 2 or 3 or 10 . You cannot define how many i have in numbers.
Suppose you have x nuggets. I give you 20 nuggets. Then you have x+20 nuggets.
If i say x= 10 . Then you have 10+20 nuggets.
Suppose I have y cherries and I give you 10 of them. Then I have y-10 cherries balance with me.
But if I say y=100. Then I have 100-10 cherries balance with me. I have 90 cherries.
Now your problem
the rose bush costs x dollars
the lilac bush costs $ 2.50 less than the rose bush.
So the lilac bush costs x-2.50 dollars.
( if x= 7.50 then the liliac bush costs 7.50-2.50 = 5 dollars.)
A troop has to plant x bushes. They have already planted 8 of them.
So the remaining bushes they have to plant will be x-8.
Hope I was of some help. Always ready
|
|
|
