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dezoksy [38]
3 years ago
6

What are the factors of x2 – 4x – 5? Check all that apply. x – 5 x – 2 x – 1 x + 1 x + 2 x + 5

Mathematics
2 answers:
vovangra [49]3 years ago
4 0
1. x^{2} -4x-5 is a 2nd degree polynomial, so if it can be factorize, it can be factorized into two 1st degree polynomials:

x^{2} -4x-5=(x-a)(x-b)

2. consider the factorized expression. If we factorized back we would get:

(x-a)(x-b)=xx-bx-ax+ab= x^{2} -(a+b)x+ab

3. So x^{2} -4x-5=x^{2} -(a+b)x+ab

comparing the coefficients, we see that 
a+b=4 and ab=-5. 

From ab=-5, a is either 5 (b=-1) or a is -5 (b=1). Together with the condition a+b=4, we see that the right choice is a=5 and b=-1

4. so x^{2} -4x-5=(x-a)(x-b)=(x-5)(x-(-1))=(x-5)(x+1)

5. The factors are x-5 and x+1
Elenna [48]3 years ago
3 0

Answer:

its x-5 and x+1

Step-by-step explanation:

just did it and got it right

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Where should Jenna insert parentheses to make the equation true? 2 + 4.5+ 1 = 26​
swat32
The best thing I can think of is
((2)(4))(.5+1)=(2)(6)
because (2*4)(1.5)= 8*1.5
= 12
and 2*6 =12
and 12=12

I hope this is right and I hope it helps!
4 0
3 years ago
Im confused can someone please explain how to do this
ozzi

First rewrite the mixed number as an improper fraction:

-1 1/14 = -15/14

Now you have :

-3/7 / -15/14

When dividing by a fraction, flip the second fraction over and change divide to multiply:

-3/7 x -14/15

Now multiply top by top and bottom by bottom:

(-3 x -14) / ( 7 x 15) = 42/105

Simplify by diving each number by 21 to get the final answer :

2/5

4 0
3 years ago
Alana praticed dancing for 11 over 4 hours on Monday, 19 over 8 hours on Wednesday, and 2.6 hours on Friday. On which day did sh
zavuch27 [327]

On Friday because if she danced 11 - negative 4 = 15. and 19 - negative 8=27. the closest would be Friday because on that day she danced for 2.6 hours.


Hope it helps.

7 0
4 years ago
Read 2 more answers
Jessie works at least 36 hours a week. She works as a math
Olegator [25]

Answer:

The feasible region is unbounded which is the shaded portion in the graph.

Step-by-step explanation:

Given that, the number of hours Jessie works as a teacher and tutor is y and x respectively, which can't be negative.

So, x\ge0\;\cdots(i)

y\ge0\;\cdots(ii)

She works at least 36 hours a week.

\Rightarrow x+y\ge 36

\Rightarrow y\ge 36-x\;\cdots (iii)

She works as a teacher for al least twice the number of hours she works as a tutor.

\Rightarrow y\ge2x\;\cdots(iv)

The boundary of the inequalities from equations (i), (ii), (iii), and (iv) are

x=0, y=0, y=36-x and y=2x.

The feasible region is the shaded portion which is the unbounded region as shown in the graph. Any point P(x,y) from the feasible region will satisfies all the constraints.

5 0
3 years ago
The sum of two base 5 numbers 432 and 341 is.​
8_murik_8 [283]

Answer:

l think da answer iz 1323

7 0
3 years ago
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