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Find SR
A) 4
B) 5
C) 7
D) 9

Find SR A 4 B 5 C 7 D 9 class=

Sagot :

9514 1404 393

Answer:

  C)  7

Step-by-step explanation:

We have ...

  TS +SR = 19

  SR +RQ = 13

Adding these two equations together, we have ...

  TS +2·SR +RQ = 19 +13 = 32

We also have ...

  TS +SR +RQ = 25

Subtracting this from the equation above, we have ...

  (TS +2·SR +RQ) -(TS +SR +RQ) = 32 -25

  SR = 7