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Radda [10]
3 years ago
6

Find the discriminant and the number of real roots for the equation. 4x^2+12x+9=0

Mathematics
1 answer:
netineya [11]3 years ago
5 0

Answer:

Step-by-step explanation:

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A factory produces fuses, which are packaged in boxes of 22. Four fuses are selected at random from each box for inspection. The
mojhsa [17]
The probability of finding one of the two defective fuses is:
\frac{2C1\times20C3}{22C4}=0.3117
The probability of finding 2 defective fuses is:\frac{2C2\times20C2}{22C4}=0.026
Therefore the probability of rejecting is 0.3117 + 0.026 = 0.3377.
5 0
3 years ago
The difference in age between Brita and her daughter Eva is 30 years. The sum or their ages 118. How old is Eva?
Alona [7]

Answer:

Eva's age is 44 years

Step-by-step explanation:

Let

x ----> Brita's age

y ----> Eva's age

we know that

The sum or their ages 118

so

x+y=118 ----> equation A

The difference in age between Brita and her daughter Eva is 30 years

so

x-y=30 ----> equation B

Solve the system by elimination

Adds equation A and equation B

x+y=118\\x-y=30\\---------\\x+x=118+30\\2x=148\\x=74

<em>Find the value of y</em>

substitute the value of x in any equation

74+y=118\\y=118-74\\y=44

therefore

Eva's age is 44 years

3 0
3 years ago
A yogurt costs 45p hair many can be bought with £5
valina [46]

<em>11</em>

5 pound = 500 pence

500 pence/ 45 pence= 11.1111111


5 0
3 years ago
The sum of the lengths of any two sides of a triangle must be less than the length of the remaining side. True or false?
Pavlova-9 [17]

False. The Triangle Inequality Theorem states that the sum of any 2 sides of a triangle must be greater than the measure of the third side.

6 0
3 years ago
In what real-world scenario do we use systems of equations?
prohojiy [21]

The systems of equations are known to be complex. We often use systems of equations in real-world scenario such as when calculating or thinking if one will make more money at one job than the other, here we look into variables such as wages, benefits and commissions, etc.

<h3>What twenty first century tasks systems of equations handles?</h3>

They  are used to calculate the amount of tax that is charge to people. They also help man to measure and understand the real- world situations and happenings.

The field or career that Equations are known to be widely used are the engineering profession. Chemical engineers, civil engineers, electrical engineers, etc. often uses it in construction of building, lighting a place, etc.

The Systems of equations are often applied in the real world by economists and entrepreneurs to known the time of equality of supply and demand.

Learn more about systems of equations from

brainly.com/question/14323743

7 0
3 years ago
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