if the stock market gained value on friday, which value could represent this change?\nanswer\n-115.99\n-45.92…

if the stock market gained value on friday, which value could represent this change?\nanswer\n-115.99\n-45.92\n0\n+54.23\nstock market value\nday\nmonday\ntuesday\nwednesday\nthursday\nchange\n-31.62\n+12.27\n-68.37\n+61.01

if the stock market gained value on friday, which value could represent this change?\nanswer\n-115.99\n-45.92\n0\n+54.23\nstock market value\nday\nmonday\ntuesday\nwednesday\nthursday\nchange\n-31.62\n+12.27\n-68.37\n+61.01

Answer

Explanation:

Step1: Sum up the changes of the first four - day

We need to find the sum of the changes on Monday, Tuesday, Wednesday and Thursday. Let the changes be (a=-31.62), (b = + 12.27), (c=-68.37), (d = + 61.01). The sum (S=a + b + c + d). [ \begin{align*} S&=-31.62+12.27-68.37 + 61.01\ &=(12.27+61.01)-(31.62 + 68.37)\ &=73.28-99.99\ &=- 26.71 \end{align*} ]

Step2: Determine the Friday's change for overall gain

Since the market needs to gain overall, the change on Friday (x) should satisfy (x-26.71>0), that is (x > 26.71). Among the options, only (+54.23) is greater than (26.71).

Answer:

(+54.23)