Answer:
Option A.
Step-by-step explanation:
The general form of a quadratic function is
It means, power of y should be 1 and highest power of x should be 2.
In option A,
It is a quadratic function.
In option B,
Here, power of y is 2. So, it is not be a quadratic function.
In option C,
Here, highest power of x is 3. So, it is not be a quadratic function.
In option D,
Here, highest power of x is 1. So, it is not be a quadratic function.
Therefore, the correct option is A.
Answer:
d = 1.67 miles
Step-by-step explanation:
Given that,
Speed of a person, 
We need to find how many miles can you walk in 30 minutes, given the same pace.
30 minutes = 0.5 h

Speed = distance/time

So, the person will cover a distance of 1.67 miles
First, we define variables:
x: small hat
y: medium hat
z: large hat
We now write the system of equations:
x + y + z = 47
5.50x + 6y + 7z = 302
-3x + y = 0
We can write the system in matrix form as:
Ax = b
Where,
A = [1 1 1; 5.50 6 7; -3 1 0]
b = [47; 302; 0]
x = [x; y ; z]
Solving the system we have:
x = 6
y = 18
z = 23
Answer:
the coach did purchase 23 large hats
d. 23
Answer:
in my knowledge
Option A..
Step-by-step explanation:
This is an arithmetic sequence since there is a common difference between each term. ... This is the formula of an arithmetic sequence.