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# Algebra: Solving multi-step Equations

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does anyone know what "a=3400t+600" is??

Jan 15, 2019

#7
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"OK, so like the question that i need is "The altitude "a" (in feet) of a plane "t" minutes after liftoff is given by a=3400t+600. How many minutes afterliftoff is the plane at an altitude of 21,000 feet?" Sorry, i didn't put it right earlier."

Maybe you should have put that in the question.

We want to know the number of minutes and we have the value of a, 21,000. Plug in values:

21,000 = 3,400t + 600

20,400 = 3,400t

t = 6

So, it would take \(\boxed{6}\) minutes to achieve an altitude of 21,000 feet.

Jan 15, 2019

#1
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Um, I guess a is the total, and 3400t is the amount per time, and we have a starting base at 600...

Jan 15, 2019
#2
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I know, but like, i dont really know how to solve it.

Guest Jan 15, 2019
#3
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You really can't solve ONE equation with TWO variables without more information.....like another equation relating the two variables...OR a value for one of the variables (a or t)

As written there are infinite answers,,,,, Jan 15, 2019
#4
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I'm sorry, but math isn't really my "thing" so i have no idea what you mean. May you please say it a little more to where a teenage girl can understand please?

Guest Jan 15, 2019
#5
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Sorry.....    You have ONE equation    a = 3400t + 600

and TWO variables    a  and  t

you cannot solve this equation unless you are given  a   or  t     OR you have another equation which involves a and t

say     a= 12 t      or something like that.....

ElectricPavlov  Jan 15, 2019
#6
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OK, so like the question that i need is "The altitude "a" (in feet) of a plane "t" minutes after liftoff is given by a=3400t+600. How many minutes afterliftoff is the plane at an altitude of 21,000 feet?" Sorry, i didn't put it right earlier.

Guest Jan 15, 2019
#9
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Heck yah!   There ya go.... we needed the 'a'        21000 ft         TwentyFour posted the solution......

ElectricPavlov  Jan 15, 2019
#10
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Lol, thanks for trying to help me though. I really appreciate it :)

Guest Jan 15, 2019
#7
+1

"OK, so like the question that i need is "The altitude "a" (in feet) of a plane "t" minutes after liftoff is given by a=3400t+600. How many minutes afterliftoff is the plane at an altitude of 21,000 feet?" Sorry, i didn't put it right earlier."

Maybe you should have put that in the question.

We want to know the number of minutes and we have the value of a, 21,000. Plug in values:

21,000 = 3,400t + 600

20,400 = 3,400t

t = 6

So, it would take \(\boxed{6}\) minutes to achieve an altitude of 21,000 feet.

TwentyFour Jan 15, 2019
#8
0

OMG!!! Thank you so much!!!!!!!!!

Guest Jan 15, 2019