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wariber [46]
3 years ago
10

If x = –3 is the only x-intercept of the graph of a quadratic equation, which statement best describes the discriminant of the e

quation? The discriminant is negative. The discriminant is –3. The discriminant is 0. The discriminant is positive.
Mathematics
2 answers:
kompoz [17]3 years ago
5 0
\text{ if } \Delta=0\text{ then there is one x-intercept : }x=-\dfrac{b}{2a}\\\\
\text{ if } \Delta\ \textless \ 0\text{ then there are no x-intercept : } x=\varnothing\\\\
\text{ if } \Delta>0\text{ then there are two x-intercept : }x_1,x_2=\dfrac{-b\pm\sqrt{\Delta}}{2a}\\\\

<u>Answer </u>: <span>The discriminant is 0</span>
Marianna [84]3 years ago
5 0

Answer:

Step-by-step explanation:

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Mateo teaches a continuing education class at the library on tuesday nights. he estimates that 75% of his students are satisfied
vredina [299]

The computed value must closely match the real value for a model to be considered valid. If the percentage of pleased or very satisfied students remains close to 75% after Mateo surveys additional students, Mateo's model is still viable. The model is faulty if the opposite is true.

<h3>How will mateo know whether his model is valid or not?</h3>

In general, a valid model is one whose estimated value is close to the real value. This kind of model is considered to be accurate. It must be somewhat near to the real value if it doesn't resemble the real value.

If the findings of the survey are sufficiently similar to one another, then the model may be considered valid.

P1 equals 75%, which is the real assessment of the number of happy pupils

P2 is 70 percent; this represents the second assessment of happy pupils

In conclusion,  The estimated value of a model has to be somewhat close to the real value for the model to be considered valid. If the number of students who are either pleased or extremely satisfied remains close to 75 percent following Mateo's survey of more students, then Mateo's model is likely accurate. In any other scenario, the model cannot be trusted.

Read more about probability

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7 0
2 years ago
How many different numbers can you make out of 1,2,3 and they can't have two of the same numbers in 1 problem ( can't be decimal
Zigmanuir [339]
There are 3 different numbers
slot method

how many 3 digit numbers?
321
312
123
132
213
231
 

6 numbes

how many 2 digit numbers?
12
21
13
31
23
32

6 numbers

how many 1 digit numbers
1
2
3

3 of them

6+6+3=15


15 different number, yah you ar right
6 0
3 years ago
The ratio of males to females in a cycling club is 5:3.
taurus [48]

Answer:

3/2

Step-by-step explanation:

The ratio of males to females in a cycling club is 5:3.

1/3 of the males are under 18

2/9 of the females are under 18

The fraction of the club members that are under 18 is calculated as:

Male: Female = Male/Female

We are told in the above question:

1/3 of the males are under 18

2/9 of the females are under 18

Hence:

1/3 / 2/9

= 1/3 ÷ 2/9

= 1/3 × 9/2

= 3/2

The fraction of the club members that are under 18 is 3/2

6 0
3 years ago
Use the given conditions to write an equation in slope-intercept form. slope = 7, passing through (1,-3) My suggestion is to fir
sveticcg [70]

Answer:

Step-by-step explanation:

y + 3 = 7(x - 1)

y + 3 = 7x - 7

y = 7x - 10

5 0
4 years ago
Hello, me again, I need help on this other division Math question, help.
Westkost [7]
Answer: 15 with a remainder of 3
3 0
3 years ago
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