Question 349610


Rate*Time=Distance
{{{R*t=D}}}
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First part of the trip:
1.{{{R[1]*t[1]=120}}}
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Second part of the trip:
2.{{{(R[1]+10)*t[1]=160}}}
Solve for {{{t[1]}}}
{{{R[1]*t[1]+10*t[1]=160}}}
{{{120+10*t[1]=160}}}
{{{10*t[1]=40}}}
{{{highlight(t[1]=4)}}}
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Then from eq. 1,
{{{R[1]*4=120}}}
{{{R[1]=30}}}mph