2x + 1 + 5x + 5 + 90 = 180
7x + 96 = 180
7x = 180 - 96
7x = 84
x = 12
Answer:
First we need to name some of the variables we are given:n = 38 the sample sizex = 6.88 the sample mean = 1.86 the population standard deviationWe need to find a 90% confidence interval for the mean price per 100 lbs of watermelon: = 1-.90 = .10/2 = .05z(/2) = -1.64-z(/2) = 1.64This can give us a probability expression:P(-1.645 < z < 1.645) = .90The margin of error is calculated with the formula: E = z(/2)(/√n)E = 1.645(1.86/√38) = $.4963(300) = $148.89 Then to calculate the upper and lower limit we add and subtract E from x:lower limit = 6.88 - .4963 = $7.38(300) = $2214upper limit = 6.88 + .4963 = $6.38(300) = $1914Note: We multiply the E, upper and lower limits by 300 because 15 tons is 30000lbs and we need the price per 100 lbs, so we divide 30000/100 and get 300.
Step-by-step explanation:
Answer:
y = $15.50x + $10
Step-by-step explanation:
y =mx +b
y = $15.50x + $10
m = cost per months
x= number of months
b = Money to join
y= total cost
Answer:
Step-by-step explanation:
3 pears, 9 apples
the ratio of pears to apples is 3:9 which reduces to 1:3
now if it wanted the ratio of apples to pears, it would be 9:3 which reduces to 3:1
*****pay close attention to the way it is worded
Answer:
5.3%
Step-by-step explanation: answer fo
r delta math
