To find the solutions (or, in other words, zeroes) of a quadratic function/equation we use the discriminant (the part that's inside the square root of the quadratic formula, $b^2-4ac$ .)

If the discriminant is smaller than 0, there are no zeroes

If the discriminant is equal to 0, there is one zero

If the discriminant is larger than 0, it has two zeroes

The discriminant is commonly denoted as $\Delta$ .

5 0

3 years ago

A graph of a quadratic function is shown below.

rewona [7]

(0,800) because it is at 800 but isn’t at zero on the x axis

5 0

3 years ago

A population consists of 500 elements. We want to draw a simple random sample of 50 elements from this population. On the first

serious [3.7K]

Answer: correct option is A

0.100

Step-by-step explanation:

Given that

population = 500 elements.

To draw a simple random sample of 50 elements from this population. On the first selection

The probability = 50/500 = 0.1

The probability of an element being selected is 0.100

3 0

3 years ago

An automobile tire manufacturer collected the data in the table relating tire pressure X (in pounds per square inch) andmileage

kaheart [24]

Step 1

Graph the function using the values in the table

Step 2

Find the quadratic function that best fits the data set from the graph

$\begin{gathered} f(x)=-0.517857x^2+33.3929x-484.343 \\ To\text{ 3 d.p, f(x) = -0.}518x^2+33.393x-484.343 \end{gathered}$

Hence,

$\text{f(x) = -0.}518x^2+33.393x-484.343$

4 0

1 year ago