C. If a<0, then the parabola opens down
Answer:
Domain:
Range:
Step-by-step explanation:
The domain is the span of x-values the graph covers.
The range is the span of y-values the graph covers.
The given graph is a quadratic. We can see that the x-values will extend infinitely in both directions.
Thus, the domain is all real numbers.
In set notation, this is:
From the graph, we can see that the maximum value is y=-2. The graph won't ever go above this.
So, the range is all real numbers less than or equal to -2.
In interval notation, this is:
And we are done :)
The cost of 8 pounds is $16.
An equation is a mathematical statement that is made up of two expressions connected by an equal sign.
Example:
2x = 5 is an equation.
We have,
6 pounds = $12
Multiply 8/6 on both sides.
8 pounds = 8/6 x 12
8 pounds = $16
Thus,
8 pounds of apples cost $16.
Learn more about equations here:
#SPJ2
h(x) = x - 4
h(x) = 2x
h(x) = IX
Answer:
Step-by-step explanation:
(1) = f(x) = 4x
(2) h(x) = x + 4
y = x + 4
Replace x with y and vice versa:
x = y + 4
And then solve for 'y':
y = x - 4
(3) h(x) = x - 4
y = x - 4
x = y - 4
y = x + 4
(4) h(x) = 2x
y = 2x
x = 2y
y =