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OllieMoo
07.07.2019 •
Mathematics
If the train that megan is riding covers 120 miles in 4 hours, how fast is the train traveling?
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Ответ:
Ответ:
AN = 9
Step-by-step explanation:
so we can imagine this in a line like:
ANX
Step 1 : solve for x
AX=21 (our total)
because we know that AN+NX together makes AX, we put that into an equation
AN + NX = AX
(2x+1) + (3x) = 21
2x + 1 + 3x = 21 <-- subtract 1 from both sides
2x + 3x = 20 <-- add 2x +3x
5x = 20 <-- divide 5 from both sides
x = 4
Step 2 : input x into AN
AN = 2x + 1 <-- input 4 for x
AN = 2(4) + 1 <-- simplify from there
AN = 9