If b books cost d dollars, then d books cost
A. b dollars
B. bd dollars
C. d^2/b
D. b^2/d
These are the worst questions. Its a SHSAT question
THANK YOU SOO MUCH STEVE
set it up as a units conversion problem.
b books = d dollars, so
b bk/d dol = 1
d dol/b bk = 1
That is, books go at the rate of b/d books/dollar, or d/b $/bk
Now, you want to convert d books to dollars. You can always multiply by 1, so do it to cancel the units you don't want.
d books * d dol/b books = d^2/b dol
To solve this problem, we can use the concept of proportionality. If b books cost d dollars, we can set up a proportion to find how much d books would cost.
Let's set up the proportion:
b books / d dollars = d books / x dollars
Here, x represents the unknown cost of d books.
Cross-multiplying, we get:
(b books) * (x dollars) = (d books) * (d dollars)
Simplifying further, we have:
bx = d^2
To solve for x (the cost of d books), we divide both sides of the equation by b:
x = d^2 / b
Therefore, the correct answer is C. d^2 / b, which represents the cost of d books when b books cost d dollars.