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quester [9]
3 years ago
8

PLEASE HELP ME!!!

Mathematics
2 answers:
Helen [10]3 years ago
8 0

Answer:

Just took it!

Step-by-step explanation:

Ede4ka [16]3 years ago
7 0

The roots of the quadratic equation ax^2+bx+c=0 are

x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}.

Here the given quadratic equation is 5x^2-13x+7=0. Here a=5,b=-13,c=7.

The roots are

x=\frac{13 \pm \sqrt{13^2-4*5*7}}{2*5} \\ x=\frac{13 \pm \sqrt{29}}{10}

You might be interested in
Derive the equation of the parabola with a focus at (-5,5) and a directix of y = -1
Paladinen [302]

Answer:

D

Step-by-step explanation:

From any point (x, y) on the parabola the focus and directrix are equidistant

Using the distance formula

\sqrt{(x+5)^2+(y-5)^2} = | y + 1 |

Squaring both sides

(x + 5)² + (y - 5)² = (y + 1)^2 , that is

(y + 1)² = (x + 5)² + (y - 5)² ← subtract (y - 5)² from both sides

(y + 1)² - (y - 5)² = (x + 5)² ← expand left side and simplify

y² + 2y + 1 - y² + 10y - 25 = (x + 5)²

12y - 24 = (x + 5)² ← factor left side

12(y - 2) = (x + 5)² ← divide both sides by 12

y - 2 = \frac{1}{12} (x + 5)² ← add 2 to both sides

y = \frac{1}{12} (x + 5)² + 2

or

f(x) = \frac{1}{12} (x + 5)² + 2 → D

7 0
3 years ago
Someone help, the question is on the attachment.​
gavmur [86]
The answer is y = 2.
6 0
3 years ago
I need to know of an expression, that also uses an exponent that is equivalent to 5^-3
strojnjashka [21]

Answer:

1/5^3

\frac{1}{5^{3} }

Step-by-step explanation:

I'm not sure how to explain this, but if there is a negative exponent, then it can be written like this, as the denominator of a fraction.

5 0
3 years ago
Is 3/1 rational or irrational
Arte-miy333 [17]
It is rational number because irrational numbers are endless
5 0
3 years ago
I need help with this question, can you help me?​
Alenkinab [10]

Answer:

ano yan hindi ko alam yan ha kaya mo yan

7 0
3 years ago
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