If r is directly proportional to t and if r = 3/4 when t = 5/8, what is the value of t when r = 9/25? (Answer in decimal form

Question

anonymous · Answer

somebody please help!

hero · Answer

What happened to the other question?

anonymous · Answer

i got help lol

anonymous · Answer

and this ones harder to

hero · Answer

1. Anytime, one variable is directly proportional to another variable, there is always a constant, c, that needs to be found. This relationship can be expressed as an equation.

2. In this case, that equation is r = ct

3. Input the values r = 9/25 and t = 5/8 into the given equation above. Let me know what you get afterwards.

anonymous · Answer

like the problem im having is with the decimals because i cant do them like i get how to kinda do the equations but not when there using decimals

hero · Answer

Forget about the decimals for now. Just do exactly as I have suggested above.

anonymous · Answer

so like 9/25 divided by 5/8 would equal c?

hero · Answer

Yes

hero · Answer

And you already know how to find c because you already know how to divide fractions, right?

anonymous · Answer

haha not when they look like that

hero · Answer

You mean like this:
$$\frac{9}{25} \div \frac{5}{8}$$

anonymous · Answer

should i cross multiply?

hero · Answer

You can only cross multiply if there's an equal sign separating them.

hero · Answer

I suppose you forgot about the reciprocal rule.

anonymous · Answer

yess i don't know what im doing and i don't know if i ever learned that.

anonymous · Answer

how do you know so much?

hero · Answer

You mean you never learned that 

$$\frac{a}{b} \div \frac{c}{d} \rightarrow \frac{a}{b} \times \frac{d}{c}$$

hero · Answer

Trust me, you have no idea how much I know.

anonymous · Answer

no! ha i just got done the 10th grade last year. they give me really hard stuff because they think i can do it when inreality i cant

anonymous · Answer

are you like a teacher? or college student?

hero · Answer

Do I have to be a teacher or college student to know how to divide fractions?

hero · Answer

I know eight year olds who can do the same thing.

anonymous · Answer

can you help me do this study island stuff because i cant.  and no

hero · Answer

All you have to do is post your questions and someone will likely help.

anonymous · Answer

okay