Answer:
6(7+4) is correct.
Explanation:
answer each problem one by one. for the first one, 8(5+3), 8 times 5 is 40. you need 42, not 40. for the second one, 6(7+4), 6 times 7 is 42. 6 times 4 is 24. this problem simplified is 42+24. so that one is correct. but still, study every problem to understand. 4(10+6) is the third problem. 4 times 10 is 40. not correct. 14 times 3 is 42. that is correct so let's see where this problem leads to. 14 times 2 is 28. not correct. therefore, 6(7+4) is correct.