15500 times 0.37 is 5735.
$5735
The 11% statement is extra information.
If you complete the square you get

and as any number squared is positive and 4 is positive, the result must be positive
Answer:
Step-by-step explanation:
(a)
Total cost = (7 items * Cost per item) + Shipping fee = 7*6.5 + 8.5 = $54
(b)
Modelling the above equation with symbols:
c = s*6.5 + 8.5 = 6.5s + 8.5
(c)
For a total cost of 80$, c = 80:
80 = 6.5s + 8.5
Calculating, we get:
s = 11 items
Rachel ordered a total of 11 items
Answer:
0.159
Step-by-step explanation:
Given that:
Sample size (n) = 100
Population mean(pm) = 50
Standard deviation (s) = 8
Probability that Sample mean (m) will be greater Than 50.8
Using the relation :
(sample mean - population mean) / (standard deviation /sqrt(n))
P(m > 50.8)
Z = (50.8 - 50) / (8/ sqrt(100))
Z = 0.8 / (8/ 10)
Z = 0.8 / 0.8
Z = 1
P(Z > 1) = 0.15866 ( Z probability calculator)
Hence,
P(Z > 1) = 0.159 ( 3 decimal places)
Answer:
<h2>One kilogram of oranges cost $3.</h2>
Step-by-step explanation:
The problem states
- 1 kilogram of bananas costs as much as 2 kilograms of oranges. (
) - 30 kilograms of oranges plues 45 kilograms of bananas cost $360.
Let's call
one kilogram bananas and
one kilogram oranges. The cost is related by

Also, we know by given

Replacing the first equation into the second one, we have

Then, we find the other value

Therefore, one kilogram of oranges cost $3.