nonsense: report
1. four times a number increase by 5 is 37, find the number
2. Mia is 5 years younger than ivy, next year, their ages will have a sum equal to 57. how old are they now?
3. Robin can do the job in 3 hours. Mel can do the same job in 4 hours. how long could it take them if they work together.
thank you
1. four times a number increase by 5 is 37, find the number
2. Mia is 5 years younger than ivy, next year, their ages will have a sum equal to 57. how old are they now?
3. Robin can do the job in 3 hours. Mel can do the same job in 4 hours. how long could it take them if they work together.
thank you
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Answer:
1) Equation:
4(x)+5=37
4(x)=37-5
4(x)=32 4(8)=32
the number is 8
2) x = age of ivy
y = age of mia
x = y - 5
(x + 1) + (y + 1) = 57
x + y + 2 = 57
x + y = 55
y - 5 + y = 55
2y = 60
y = 30 x = 30 - 5 = 25
ivy - 25 years old
mia - 30 years old