Please help me, I really don’t understand this and the last time I tried to get a answer it got deleted..

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

Amath test has a total of 20 problems some problems are worth two points and some are worth three points the whole test is worth 452 points how many three-point problems were there

In a race, there are 9 runners. trophies for the race are awarded to the runners finishing in first through third place. in how many ways can first through third place be determined 27 84 504 60,480