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tino4ka555 [31]
3 years ago
11

The discriminant of a quadratic equation is the value B squared -4 AC what is the value of the discriminant of 0=-2x+6x+13

Mathematics
1 answer:
kirill115 [55]3 years ago
6 0

Answer:

108.

Step-by-step explanation:

Comparing the given equation with  the general form:

ax^2 + bx +   c = 0 ,

-2x^2 + 6x + 13 = 0 .

We see that  a = -2, b = 6 and c = 13.

So the discriminant

= b^2 - 4ac  

= (-2)^2 - (4 *-2 * 13)

= 4 - (-104)

= 4 + 104

= 108  (answer).

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A manufacturing machine has a 10% defect rate.If 4 items are chosen at random, what is the probability that at least one will ha
vagabundo [1.1K]

Solution

Step 1

\begin{gathered} probability\text{ of defective p = 10\% = }\frac{10}{100}\text{ = 0.1} \\  \\ probability\text{ of not defective q = 1 - p = 1 - 0.1 = 0.9} \\  \end{gathered}

Step2

The probability that at least one will have a defect

= 1 - the probability that noon will have a defect

Step 3

Use the binomial distribution

\begin{gathered} =1\text{ - }^nC_rp^rq^{n-r} \\ n\text{ = 4, r = 0} \\  \\ =1-^4C_0(0.1)^0(0.9)^{4-0} \\  \\ =\text{ 1 - 1}\times1\times0.9\times0.9\times0.9\times0.9 \\  \\ =\text{ 0.344} \end{gathered}

8 0
2 years ago
Which of the following is a term in the<br> expression 3x2 + 5x +9?
Sergio [31]

Answer:

Two.

Step-by-step explanation:

In algebra, a term is either a single number or variable, or numbers and variables multiplied together. In any equation, all of the numbers there that aren't divided by a mathematical operation (times or divide symbols) are terms.

3x2 isn't a term, it's an expression - but 5x and 9 are, so therefore there are 2 terms.

8 0
4 years ago
Use graphing technology to find the range of the function f(x)=2^x+1.f(x)=2 <br> x<br> +1
marusya05 [52]

The range of the given function is equal to (2, 7).

<h3>What is a range?</h3>

A range can be defined as the set of all real numbers that connects with the elements of a domain. This ultimately implies that, a range refers to the set of all possible output numerical values, which are shown on the y-axis of a graph.

<h3>How to identify the range and domain of this graph?</h3>

The vertical extent of a graph represents all range values and they are always read and written from smaller to larger numerical values, and from the bottom of the graph to the top.

Similarly, the horizontal extent of a graph represents all domain values and they are also read and written from smaller to larger numerical values, and from the left of the graph to the right.

By critically observing the graph of function f(x) shown, we can infer and logically deduce the following:

Range = (2, ∞).

Read more on range here: brainly.com/question/17295757

#SPJ1

3 0
1 year ago
The difference of two numbers is 2. The sum of the same two numbers is 6. Find the numbers. Write the numbers from least to grea
Nady [450]

Answer:

2 and 4

Step-by-step explanation:

It says it on the correct answer box.

The difference in two numbers is 2.

2 and 4 are two numbers away from each other.

The sum of the same two numbers is 6.

2+4=6

In least to greatest order they would be written 2, 4

8 0
3 years ago
The perimeter of the polygon above is?
gregori [183]
The answer is 38 cm u just add all sides to get ur answer
in other words
4+4+5+6+10+9 =38cm
4 0
3 years ago
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