I am pretty sure that the answer is A. because the slopes are reciprocals of each other, and so they are perpendicular
Answer:
2 → 3 → 1 → 4
Step-by-step explanation:
We are given the list of cost of fabric in dollars per square yard.
So, the total cost per square yard of different fabric are:
1. 6.5 for $6.25 =
= 0.96
2. 4 for $3 =
= 0.75
3. 8.5 for $8.10 =
= 0.95
4. 6 for $7.20 =
= 1.2
Since, 0.75 < 0.95 < 0.96 < 1.2
Hence, from least to the greatest unit cost, the sequence is 2 → 3 → 1 → 4.
Answer: 13x+3y-3+y^2
Step-by-step explanation:
(7x+6x)+3y+(-2-1)+y^2
13x+3y-3+y^2
Answer:
(d) 0.8736
Step-by-step explanation:
Unless you have a table of the normal distribution available, this is a calculator problem. Your calculator, or any spreadsheet, can tell you the probability is ...
P(-1.23 ≤ z ≤ 2.12) ≈ 0.8736
We know that 15 elves represent the 20% of the total.
Since 20% is one-fifth, the total number of elves is
![15\cdot 5 = 75](https://tex.z-dn.net/?f=15%5Ccdot%205%20%3D%2075)
Alternatively, solve the proportion
![15\div x = 20\div 100](https://tex.z-dn.net/?f=15%5Cdiv%20x%20%3D%2020%5Cdiv%20100)
which yields
![x=\dfrac{1500}{20}=75](https://tex.z-dn.net/?f=x%3D%5Cdfrac%7B1500%7D%7B20%7D%3D75)