Write a linear eq. expressing S as a function of L for the problem below?
If a child's foot is 7.75", then the child wears a size 13. If the child foot is 5.75 the child wears size 7. The shoe size S is a linear function of the length of the foot L.
Write a linear eq. expressing S as a function of L for the problem below?
A linear eq has the form y = ax + b; for this problem, S = aL + b, and you need to find values for a and b (two unknowns). You are given two conditions: S = 13 when L = 7.75, and S = 7 when L = 5.75. Set up the equations:
13 = a*7.75 + b
7 = a*5.75 + b
Solve for a and b by any of the methods used for simultaneous linear equations.
Ex: subtract the second eq from the first to get
6 = 2*a. or a = 3
Then put a into either equation to get b:
13 = 7.75*3 + b, or b = 13 - 3*7.76 = -10.25
so the linear eq is
S = 3*L - 10.25
- How to talk to another mom abo..
- I got so many great reponses to my earlier question about a friends child who is bullying my 4 yr old daughter in preschool. Almost everyone suggested..
- Does Any1 Know How the Short P..
- I read it somewhere, but dont remember where. But the last two lines went something like this: ...the only words he knew, a ball, a fish, a top, a sho..
- What is this character in chil..
- is she dorothy from wizard of oz??What is this character in childrens book, the little girl who wears red shoes???Well Dorothy from Wizard of Oz wore ..
- What is this character in chil..
- Dorothy of Wizard of OzWhat is this character in childrens book, the little girl who wears red shoes???Sounds like Dorothy to me. is there a dog named..
- BALLET SHOES do you remember t..
- It was called The jewels of the Madonna but I cant remember who wrote it. I only hope that the TV version of the book is as good.BALLET SHOES do you r..
- I am starting a children&#..
- I am mainly trying to find where I can buy childrens shoes- llamour and puddle jumpers in particular. Does anyone have any suggestions where I can fin..
- Do you keep your children&..
- Chances are, the clothes will be outdated by then. You would be smarter to donate the clothes to a charity, or pass them along to a friend who can use..
- Converting women's to..
- I am planning on buying some shoes online, and the store has identical versions in kids and womens sizes. The childrens shoes are much cheeper, of cou..
- Is there any where to purchase..
- Check out http://www.mixmatchshoes.com/! There are shoes in all sorts of styles that you can buy in two different sizes at a time.Is there any where t..
- Hi everyone. Where could I fin..
- Nordstroms has been known to carry some of the larger and smaller shoe sizes.Hi everyone. Where could I find womens shoes in size 4 besides zappos.com..