Factor 2x2 - 9x - 11.

1 answer:

6 0

Since 2 and 11 are prime we have
(2x 1)(1x 11) or
(2x 11)(1x 1)
we just need to figure out the signs

remember
(ax+b)(cx+d)=acx^2+bcx+adx+bd
the middle term coeficient is bc+ad
so
2x times 11=22x
1x times 1=x
there is not way to add or subtract 22x and x to get -9x

1st one is wrong

(2x 11)(x 1)

2x times 1=2x
11 times x=11x
11x-2x=9x

the 2x or the 1 has to have the negative

(2x+11)(x-1)

You might be interested in

Me puedes ayudar a resolberla mas tardar a las 3:30

Luba_88 [7]

Answer:

está difícil pero yo ya e visto ese tema ayer pero no tengo ese ejercicio lo siento

7 0

3 years ago

The athletic club at school sold raffle tickets to raise money for equipment. The club sold a total of 1050 tickets,515 to teach

Arlecino [84]

Answer:

Probability of the teacher or other staff is 0.7143

Step-by-step explanation:

pr(teacher or other staff) = pr(teacher) + pr(other staff) - pr(teacher and other staff)

Total number of tickets = 1050

Number of tickets sold to teachers = 515

Number of tickets sold to other staff = 235

pr(teacher) = $\frac{515}{1050}$

= 103 $\frac{2}{10}$

= 0.4905

pr(other staff) = $\frac{235}{1050}$

= 47 $\frac{2}{10}$

= 0.2238

Since the picking of the wining ticket is mutually exclusive, then;

pr(teacher and other staff) = 0

Thus,

pr(teacher or other staff) = 0.4905 + 0.2238 - 0

= 0.7143

4 0

3 years ago

For what value of x is line m parallel to line n?

kogti [31]

Answer:

$x=10$

Step-by-step explanation:

Here, we can use an angle rule.

We see that angles $(8x+50)$ ° and 130° are under a sort of F shape, where lines m and n are the horizontal parts of the letter and where the diagonal line is the vertical part of the letter.