3 years ago

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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I need help for these two Im3

frez [133]

For number one you do 15-9 which is 6 and that’s the answer

For number to do 25-18 which is 7 and that’s the answer for that one

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2 years ago

Solve for x (19x-18) (7x+1) (10x-9)

ExtremeBDS [4]

Answer:

Step-by-step explanation:

Exterior angle property: Exterior angles equals the sum of remote angles

19x - 18 = 7x + 1 + 10x - 9

19x - 18 = 7x + 10x + 1 - 9 {Combine like terms}

19x - 18 = 17x - 8 {Subtract 17x from both sides}

19x - 17x - 18 = -8

2x - 18 = -8 {Add 18 to both sides}

2x = -8 + 18

2x = 10

x = 10/2

x = 5

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3 years ago

One number added to three times another number is 24. Five times the first number added to three times to other number is 36. Fi

Marrrta [24]

The numbers are 3 and 7

Step-by-step explanation:

Let the first number be x and the second number be y

Then according to given statement

One number added to three times another number is 24

x+3y=24 Eqn 1

Five times the first number added to three times to other number is 36

5x+3y=36 Eqn 2

Subtracting Equation 1 from equation 2

$5x+3y-(x+3y)=36-24\\5x+3y-x-3y=12\\4x=12$

Dividing both sides by 4

$\frac{4x}{4}=\frac{12}{4}\\x=3$

Putting x=3 in equation 1

$3+3y=24\\3y=24-3\\3y=21$

Dividing both sides by 3

$\frac{3y}{3} = \frac{21}{3}\\y=7$

Hence,

The numbers are 3 and 7

Keywords: Linear equations, Variables

Learn more about linear equations at:

#LearnwithBrainly

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4 years ago

DO IN 20 minutes help please!!!!A calculator was used to perform a linear regression on the values in the

iogann1982 [59]

Answer: The answer is b !

Hope the image helps

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3 years ago

Your mom opens an account to save money for a family vacation. The account earns an annual interest rate of 4%. She earns $37 in

Veronika [31]

The formula would be I=(37)(.04)(6) which would give you $8.88

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3 years ago

Read 2 more answers