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SVETLANKA909090 [29]
3 years ago
11

Which equation shows the quadratic formula used correctly to solve 5x2 + 3x – 4 = 0 for x?

Mathematics
2 answers:
vovikov84 [41]3 years ago
6 0

Answer:

x=\frac{-3\pm\sqrt{(3)^2-4(5)(-4)}}{2(5)}

Therefore, Option 1 is correct.

Step-by-step explanation:

We have been given the quadratic equation:

5x^2+3x-4=0

If we compare it will general quadratic equation which is: ax^2+bx+c=0

Here, a=5,b=3 and c= -4.

Now, we will use the formula:

And then x=\frac{-b\pm\sqrt{D}}{2a}

Where,D=b^2-4ac

x=\frac{-3\pm\sqrt{(3)^2-4(5)(-4)}}{2(5)}

Therefore, Option 1 is correct.

MrMuchimi3 years ago
4 0

Answer:

Choice a is correct answer.

Step-by-step explanation:

Given equation is :

5x²+3x-4 = 0

we have to solve it by finding the value of x.

ax²+bx+c = 0 is general quadratic equation.

x = ( -b±√b²-4ac) / 2a is quadratic formula which is used to find the value of x in quadratic equation.

Comparing given equation with quadratic equation , we get

a = 5 , b = 3 and c = -4

putting above values in quadratic formula  , we get

x = ( -(3)±√(3)²-4(5)(-4) ) / 2(5)

x = ( -3±√(3)²-4(5)(-4) / 2(5) which is the answer.

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Mai biked 6\frac{3}{4} miles today, and Noah biked 4\frac{1}{2} miles.
Alinara [238K]

It was 1.5 times the length of Noah's bike ride as Mai’s bike ride.

The problem we dealing with is related to mixed numbers which are referred to as mixed numbers and could be the whole number, and a proper division spoke together. It for the most part speaks to a number between any two whole numbers.

Since we are providing mai's rate which is  6 3/4  miles and Noah's  rate of 4 1/2 miles, So in  order to find the time the length of Noah's ride is compared to Mal's, we just need to divide the given rates by each other

=> 6 3/4 divided by 4 1/2,  

=> 27/4 divided by 9/2, (The result is an improper fractions)

=> 27/4 X 2/9

=>3/2

=> 1.5

To know more about mixed numbers refer to the link  brainly.com/question/24137171?referrer=searchResults.

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3 0
1 year ago
Helpppppppppppppppppppppppppppppppppppppppppp
zimovet [89]
Answer:
First choice is the correct one

Explanation:
The given is:
[(x+5) / (x+2)] - [(x+1) / x(x+2)]
First, we will need to have a common denominator and then we will solve the subtraction normally. To get a common denominator, we will have to multiply both numerator and denominator of first term by x.

Therefore:
[(x+5) / (x+2)] - [(x+1) / x(x+2)] = [x(x+5) / x(x+2)] - [(x+1) / x(x+2)]
                                                 = [x(x+5)-(x+1)] / [x(x+2)]
                                                 = (x^2 + 5x - x - 1) / [x(x+2)]
                                                 = [(x^2 + 4x - 1)] / [x(x+2)]

Hope this helps :)

3 0
3 years ago
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Answer:

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2 years ago
After Friday's football game, Megan and her friends go out for ice cream. They share the Mega Mountain sundae and finish the who
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Answer:  c=  $( 5 x 5.20)

Step-by-step explanation:

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Hence, the required equation to represent the total cost (c) of the sundae:

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