It's the bottom one. 20 dollars has to be less than or equal to the amount. you cannot spend more than $20
Y = -5x + 12 ...............
Let
x = first consecutive number
x + 1 = second consecutive number
x + 2 = third consecutive number
The sum of these numbers are 111.
x + x + 1 + x + 2 = 111
3x = 111 - 1 - 2
3x = 108
x = 36
Therefore, the smallest number is 36 because other numbers are 37 and 38.
Answer:the son working alone will take 1¹/₂ hours
Step-by-step explanation:
Step 1
let x represent the hours that the son needs to wash and wax the car alone thus his rate is 1/x cars per hour
While
the rate of the father is 1/3 cars per hour
, working together rate is 1/1 cars per hour.
Step 2
Writing it mathematically, becomes
1/x + 1/3 = 1/1
Dividing through by 3x so all denominations can be rqual to 1 , we have
3 + x = 3x
3= 3x-x
3= 2x
x= 3/2
Therefore the son working alone will take 1¹/₂ hours
Answer: The required probability is 0.68793.
Step-by-step explanation:
Since we have given that
Mean = 1050 kWh
Standard deviation = 218 kWh
n = 50
Hence, the required probability is 0.68793.
