Question

Haven’t got help with these, can someone please help me with 1-20

Answer 1

1) 8:12 is the same as 8/12 and that simplified is 2/3 or 2:3

2) 15:42 is 15/42 and that simplified is 5/14 or 5:14

    3-6 are the same

7) 340miles per 5hours is how many miles/hour → 340/5 or 68mph

    8-10 are the same (but 9 and 10 are prices instead of speed)

11) 8/21 simplified is simply 8/21, and 16/40 simplified is 2/5 so this is false

    do the same for #12

13) cross multiply → 15 * 10 = 6x → 150  = 6x → 25 = x

    cross multiply for 14-16 as well

17) 3,000,000 ÷ 120 = 25,000 per dollar; 5,000,000 ÷ 175 = 28,571 per dollar the second one is the better buy

18) 16,000:18,000 simplified is 8:9

Number 19 was cut off

20) 15 seconds is 1/4 of a minute so multiply the 12 beats per 15 seconds and the 15 seconds by 4, which yields 48 beats per 60 seconds (per minute)

I hope this helps!!!!

Answer 2

I can help you with a couple

1) 2 to 3

2) 5 to 12

3) I believe this one would stay at 55 to 31 because nothing that goes into 55 can go into 31

4) 12 to 1

5) 13 to 12

6) 1 to 25

7) 68

8) 8

9) 136

10) 1.25

11) false

12) True

13) x=25

14) x=6

15) x=28

16) I want to say x=1 but not 100% sure

Hope this helps :)