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marta [7]
3 years ago
8

Let ​ f(x)=x2−6x−27 ​ . Enter the x-intercepts of the quadratic function in the boxes. x = and x =

Mathematics
2 answers:
Akimi4 [234]3 years ago
8 0

Answer:

-3, 9

Step-by-step explanation:

x^2 -6x - 27=

= x^2 - 9x + 3x - 27

= x(x - 9) + 3(x - 9)

= (x + 3)(x - 9)

x = -3, x = 9

iren2701 [21]3 years ago
8 0

Answer:

x = 9

x = - 3

Step-by-step explanation:

This factors.

The best way to do this is to start by seeing what answers are possible. Start with 27. What 2 numbers multiply to 27. There aren't many.

27: 1 * 27

27: 3*9                

Now you need the two numbers to add to -6. That means the larger one should be -

The answer is 3 and 9

So the factors are

(x - 9)(x + 3)

x - 9 = 0

x = 9

========

x + 3 = 0

x = - 3

================

The intercepts are the points (9,0) and (-3,0)

x = 9

x = - 3

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N the spring of 2008, petrol cost £1.029 per litre in london. on the same day, the exchange rate was $1 = £0.497. what was the p
Dmitriy789 [7]

1 liter of petrol in London costs £1.029

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3 0
2 years ago
A boy's age in ten year time will be four times his age five years ago. Find his present age. ​
Katyanochek1 [597]

Answer:

He is ten.

Step-by-step explanation:

10 yrs old. Go ahead 10 yrs to make 20. Which is four times as much as five years old. (Which is 5 years before 10)

Hope this helps! :)

8 0
3 years ago
Help my math please<br> Due date is in 3 hours
Bumek [7]

Answer:

see explanation

Step-by-step explanation:

(a)

To change a mixed number to an improper fraction

Multiply the whole number by the denominator of the fraction and add the numerator. This value is the numerator of the improper fraction while the denominator remains unchanged, that is

(2 × 13) + 12 = 26 + 12 = 38 ← numerator

2 \frac{12}{13} = \frac{38}{13}

(b)

To change an improper fraction to a mixed number

divide the numerator by the denominator, noting the remainder, which forms the numerator of the fraction in the mixed number.

\frac{47}{19} = 2 remainder 9, hence

\frac{47}{19} = 2 \frac{9}{19}



7 0
3 years ago
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Ivahew [28]
7/12 is the answer :)
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