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 2 years ago
Christopher is 4 times as old as Michael. Ten years ago, Christopher was 9 times as old as Michael.How old is Christopher now?
 2 years ago
Christopher is 4 times as old as Michael. Ten years ago, Christopher was 9 times as old as Michael.How old is Christopher now?

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geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0Are you able to turn the sentence into an equation?

sws._.
 2 years ago
Best ResponseYou've already chosen the best response.0i think that is what im supposed to do, but im having trouble setting it up

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0Okay, no problem. Do you have a guess as to how you would start?

sws._.
 2 years ago
Best ResponseYou've already chosen the best response.04x10 is this one side of the equation?

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0Can you write an equation for right now? Let's say time = 0 right now.

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0Use C and M for your variables.

sws._.
 2 years ago
Best ResponseYou've already chosen the best response.0okay but how would i set it up?

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0"Christopher is 4 times as old as Michael." Write that algebraically.

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0Right. But you need an equals sign and something on the other side. For example, if steak is 10 times heavier than rice, steak = 10 * rice, which as a formula would be S = 10R

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0So how would you write a formula for "Christopher is 4 times as old as Michael?"

sws._.
 2 years ago
Best ResponseYou've already chosen the best response.04m=10(4x9) ? i have no idea ._.

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0That's okay. Not to worry. It's C = 4M

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0That is a perfectly valid statement for right now. Now, the tougher part, you need to write a formula for 10 years ago.

sws._.
 2 years ago
Best ResponseYou've already chosen the best response.0oh okay i know that 10 has to be outside the parenthesis

sws._.
 2 years ago
Best ResponseYou've already chosen the best response.0because it says 9 times as old as Christopher

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0On the side where parentheses matter, the 10 will actually need to go inside. You need to write an equation for the second statement which uses the variables for their current ages. That might sound complex, but it's as simple as: My current age might be x. I can say that 10 years ago, my age was x  10. It doesn't matter what x represents; x  10 is valid no matter what.

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0Yes, right! The 9 goes outside.

sws._.
 2 years ago
Best ResponseYou've already chosen the best response.0okay so it would be 9(x10) ?

sws._.
 2 years ago
Best ResponseYou've already chosen the best response.0i mean c. im using x instead of c

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0Remember, you need an equal sign, and stuff on both sides of it.

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0Okay, we can use x instead of C. But then what are we using instead of M?

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0Remember, for now, we are keeping their ages separate.

sws._.
 2 years ago
Best ResponseYou've already chosen the best response.0i guess we can use y or m but i like x instead of c

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0Sure. Okay, so in the formula I gave before, x = 4y Chris (x) is 4 times older than Michael (y) right now.

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0So now, we need to do our "10 years ago" formula.

sws._.
 2 years ago
Best ResponseYou've already chosen the best response.0would it be the one i mentioned before?

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0Yes, but you used x. It should be y.

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0And you need your full formula.

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.0@sws._. Mention me if you feel like continuing. I'd like to help you learn this so you can do your other 11 questions.
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