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tangare [24]
3 years ago
7

I WILL NAME YOU THE BRAINLIEST!

Mathematics
2 answers:
OlgaM077 [116]3 years ago
5 0

Answer: c=5.4

The two roots are 3/5 and 9/5


Step-by-step explanation:

assume 5x2−12x c=0 is supposed to be 5x^2 - 12x + c = 0

p = (12 + sqrt(144-20c))/10

q = (12 - sqrt(144-20c))/10

p-3q=0,

1.2 + 0.1sqrt(144-20c) +

-3.6 + 0.3sqrt(144-20c) = 0

-2.4 + 0.4sqrt(144-20c) +2.4 = 2.4

sqrt(144-20c) = 2.4/0.4 = 6

144-20c=36

144-36=20c

c = 108/20 = 5.4

5x^2-12x+5.4=0

x = 3/5 or x = 9/5


blondinia [14]3 years ago
4 0

Answer:

c = 27/5

Step-by-step explanation:

Given data:

Standard form of the quadratic equation

a x² + b x + c = 5 x² - 12 x + c = 0

and relation between the roots x₂ = 3 x₁

From which we conclude the following:

a = 5 , b = -12 and c = ?

To solve this problem we will use the Vieta's formulas, they read:

x₁ + x₂ = - b/a  and x₁ · x₂ = c/a

First we will replace x₂ = 3 x₁ in the first formula and get:

x₁ + 3 x₁ = - (-12)/5  =>  4 x₁ = 12/5 => x₁ = (12/5) : 4 = 3/5

x₁ = 3/5

Now we will replace x₁ = 3/5 in the relation x₂ = 3 x₁ and get:

x₂ = 3 · 3/5 = 9/5

x₂ = 9/5

Now we will replace value for x₁ = 3/5 and x₂ = 9/5 in the second formula

x₁ · x₂ = c/a  and get:

(3/5) (9/5) = c/5 => 27/25 = c/5 => c = (27/25) : 5 = 27/5

c = 27/5

Now the quadratic equation reads:

5 x² - 12 x + 27/5 = 0  / · 5

We will multiply whole equation with number 5 and get:

25 x² - 60 x + 27 = 0

Prove:

Every quadratic equation can be factorized as follows:

a (x - x₁) (x - x₂) = a x² + b x + c

we calculated x₁ = 3/5 and x₂ = 9/5

5 (x - (3/5)) (x - (9/5)) = (5 x - 3) (x - (9/5)) = 5 x² - 9 x - 3 x + 27/5 =

= 5 x² - 12 x + 27/5

God with you!!!


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Problem: Match each value on the left with the number on the right that includes that value.
Anestetic [448]

Answer:

5 Thousands ⇒ 45,089

8 Hundreds ⇒ 958,823

3 millions ⇒ 3,072,700

2 Ten thousands ⇒ 7,426,580

7 Hundred Thousands ⇒ 752,671

Step-by-step explanation:

Solution:

We need match the numbers with given set of numbers.

Now,

5 thousands ⇒

So we can say that from given set of the numbers we need to find the number 5 belongs in thousands place.

So we can say that the number 5 in thousands place from given of number is ;

5 Thousands ⇒ 45,089

8 Hundreds ⇒

So we can say that from given set of the numbers we need to find the number 8 belongs in hundred place.

So we can say that the number 8 in Hundred place from given of number is ;

8 Hundreds ⇒ 958,823

3 Millions ⇒

So we can say that from given set of the numbers we need to find the number 3 belongs in millions place.

So we can say that the number 3 in Millions place from given of number is ;

3 millions ⇒ 3,072,700

2 Ten thousands ⇒

So we can say that from given set of the numbers we need to find the number 2 belongs in Ten thousands place.

So we can say that the number 3 in Ten Thousands place from given of number is ;

2 Ten thousands ⇒ 7,426,580

7 Hundred thousands ⇒

So we can say that from given set of the numbers we need to find the number 7 belongs in Hundred thousands place.

So we can say that the number 7 in Hundred Thousands place from given of number is ;

7 Hundred Thousands ⇒ 752,671

Hence the matching numbers are

5 Thousands ⇒ 45,089

8 Hundreds ⇒ 958,823

3 millions ⇒ 3,072,700

2 Ten thousands ⇒ 7,426,580

7 Hundred Thousands ⇒ 752,671

6 0
2 years ago
I need help with this problem. Please!
Leviafan [203]
The first blank is 69 degrees
6 0
3 years ago
Given that f(x)=6x+2 and g(x)=2x+4/5 solve for g(f(1))<br><br> A.1<br> B.3<br> C.4<br> D.8
GrogVix [38]

Answer:

The value of g(f(1)) is 84/5

Step-by-step explanation:

To find the answer to a composite function, start with the function on the inside, which is f(1). So, we input 1 into the f(x) equation and evaluate.

f(x) = 6x + 2

f(1) = 6(1) + 2

f(1) = 6 + 2

f(1) = 8

Now that we have the answer of 8, we can input that in for x in the outside function, which is g(x).

g(x) = 2x + 4/5

g(8) = 2(8) + 4/5

g(8) = 16 + 4/5

g(8) = 84/5

6 0
2 years ago
Of all the rectangles with an area of 441 square feet, find the dimensions of the one with the smallest perimeter.
Drupady [299]
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</span>
21&21 have the smallest sum and would make for the smallest perimeter

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6 0
3 years ago
18 pizzas were orderd for a holiday party at reedy creek elementary there were cheese and pepperoni pizzas of 1/3 of the pizza w
viktelen [127]

Answer:

12

Step-by-step explanation:

We know that 1/3 of a pizza is cheese meaning that 6 pizzas are made of cheese and there are only two leaving the rest pepperoni and 12 are left if we subtract the cheese pizzas minus the 18 pizzas we have 12 which are pepperoni.

8 0
3 years ago
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