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Mathematics 7 Online
OpenStudy (anonymous):

What is the value of t? Eighteen over forty-five equals two over t.

OpenStudy (fifciol):

\[\frac{ a }{ b }=\frac{ c }{ d } \rightarrow ad=bc\]

OpenStudy (anonymous):

huh??

OpenStudy (fifciol):

\[\frac{ 18 }{ 45 }=\frac{ 2 }{ t }\] use the formula above to find t

OpenStudy (anonymous):

how

OpenStudy (fifciol):

multiply 18 with t and 45 with 2 then equal both sides

OpenStudy (fifciol):

what will you have?

OpenStudy (anonymous):

180

OpenStudy (fifciol):

if \[\frac{ 18 }{ 45 }=\frac{ 2 }{ t }\] then \[18*t=2*45\]

OpenStudy (fifciol):

so \[t=\frac{ 2*45 }{ 18 }\]

OpenStudy (fifciol):

so what is t?

OpenStudy (anonymous):

108 0r 72

OpenStudy (fifciol):

no, t=5. Look at the equations above to check where you're wrong

OpenStudy (anonymous):

i did it as 18 + 2+ 5 = 50 then - 5 gives me 45

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