Answer:
6
Step-by-step explanation:
4 x 6 = 24
Answer: the length of the first piece is 6 , the second is 24 and the third is 30 units
Step-by-step explanation:
let the first piece be x then the second would be 4x and third 5x
x+4x+5x=60
10x=60
x=60/10=6
4x= 6*4=24
5x=6*5=30
Answer:
2.4 books per month
explanation: 12 books divided by 5 months equals 2.4
Answer:
Step-by-step explanation:
2x-12=14
+12
2x=26/2
x=13
Let x represent the # of 2-hour days and y the # of 3-hour days. Jimmy's study was spread over 10 days. Thus, x + y must sum up to 10. Also, 2x + 3y must sum up to 22 hours.Our system now looks like this:
x + y = 10
2x + 3y = 22
Multiply the first equation by -2: -2x - 2y = -20 Add the 2nd equation to this:
-2x - 2y = -20
2x + 3y = 22
------------------ y = 2 So Jimmy had 2 3-hour study days and 8 2-hour study days.
Note how these figures add up to 22: 6 + 16 = 22
Hope that help!
