Stock market 2

For the week of July 22, the forecaster recorded the following day-to-day changes in the stock market of a specific stock: -2 on Monday, +4 Tuesday; -8 Wednesday; + 2 1/2 Thursday, - 3 1/4 Friday. The stock began the week at 78 points. How many points did it finish with at the end of the week?

Correct answer:

a5 =  71 14 = 285/4

Step-by-step explanation:

m4=221=2+21=22 2+1=24+1=25=221=2.5 m5=341=3+41=43 4+1=412+1=413=341=3.25  a0=78 a1=a02=782=76 a2=a1+4=76+4=80 a3=a28=808=72 a4=a3+m4=72+25=272 2+25=2144+25=2144+5=2149=74.5 a5=a4m5=2149413=4298413=429813=4285=7141=71.25

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