Question

Help me work through these problems? :/ I need explanations! See the attached!

Answer 1

I give medals!!!

Answer 2

1) divide both by their greatest common divisor (in this case 12). 1:3
2) multiply the 3 over to get 2=x+5. subtract 5 to get x=-3
3) .15=15/100 so it's 15%
4) the ratio of 6 to 8 is 3 to 4. not a. ratio of 5 and 10 is 1:2. not b. ratio of 4 and 10 is 2:5. 4+10=14. answer is c
5) same concept as problem 2.
6) 20% as a fraction is 20/100. so and 20/100 simplifies to 2/10. 20% of 42 is (2/10)*42 which is 84/10. moving the decimal we get 8.4
7) x*(32/100)=12. so x=12/(32/100). x=(12*100)/32 x=37.5
8) she drove had 9 L and drove 32 km. meaning when she has 50 L, she can drive 'x' km 9/32=50/x
9) 2% = 2/100. so .02
10) 925-592=333. 333/925=.36 which as you should know by now is 36%.
11) $1550*4% = 1550*.04 = $62. Multiplied by 5 years we get 62*5=310