To solve the rational cquation 4x+3 5 =7, where x * 0 or - 2, a student X x+2 wrote the following steps. Step I 2(4x+ 3) 5 7(x+2) x+2 x+2 x+2 Step II 8x +6+5=7x+14 Step III 8x +11 =7x +14 Step IV x=3 When the student analyzed his work, he saw that he had made an error in Select one: O a. step I O b. step ll O c. step Ill O d. step IVThe expression AB can be simplified to * + 4 x+3: * *-3, 3. Henry knows that one expression can be selected from each of the columns below to form a correct simplification. Possibilities Possibilities Possibilities Code for A Code for B Code for C (x - 3) 4 (2x + 8) 7 (3x2 -27) 2 (2x - 6) 5 (x + 4) 8 (2x2 -18) 3 (3x -9) 6 1 2 ( x + 4 ) 9 (12 -9) One possible selection to form a correct simplification is (x+3), (x+4) and (x2-9), so Henry records the code 159. To record another correct simplification, a code for another possibility is (record your answer as a three digit code abc). Certain expressions can be re-used.In a biathlon race, Murray must cycle 60 km and then run 20 km. Using . as his cycling speed and , as his running speed, what is the correct simplified expression for the total time needed to complete the race? Select one: O a. 60v +20v, O b. 60v, + 20v V, +v O c. 60v +20v, O d. 60v, + 20vTwo points on a coordinate grid are represented by D(p - 4, p + 2) and E(3p-5, 2p+4). A simplified expression for the slope of the line though D and E is Select one: O a . 2p-1 p+2 O b. p+6 2p-9 O c. p+2 2p-1 O d. 2p-9 p+6