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Viefleur [7K]
3 years ago
13

Factor the expression x^{2} +4x-21

Mathematics
1 answer:
Nuetrik [128]3 years ago
3 0

Answer:

This factors out to: (x + 7)(x - 3)

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Topic 5: Parallel. Perpendicular, or neither?!
viva [34]
19. Slope AB = (-8 - -11)/ (4 - 5) = 3/-1 or -3/1
CD = (-1 - 8)/ (-4 - -7) = -9/3 or -3/1
Since the slopes are the same, they are parallel

20. Slope AB = (1 - -3)/ (15 - 8) = 4 /7
CD = (3 - 10)/ (-5 - -9) = -7/4
They are opposite signs and reciprocals so they are perpendicular

21. Slope AB = (9 - 9)/(4 - -3) = 0/7 = 0 so it’s a vertical line
CD = (-2- -2)/ (6 - 10) = 0/-4 = 0 so it’s also a vert. Line
They are parallel.
4 0
3 years ago
Find the slope of each line. ​
Feliz [49]

Answer:

Slope is 1/3.

Step-by-step explanation:

..........

8 0
3 years ago
Point (0,5). m=-3
kodGreya [7K]

Answer:

D=12

Step-by-step explanation:

BECAUSE THAT IS DIVITION METHOD

7 0
3 years ago
Find the value of the variable.​
ICE Princess25 [194]

Answer:

\large\boxed{x=3\sqrt5}

Step-by-step explanation:

Look at the picture.

ΔABC and ΔDBA are similar (AA). Therefore the sides are in proportion:

\dfrac{AB}{BC}=\dfrac{BD}{AB}

We have

AB=x,\ BC=5+4=9,\ BD=5

Substitute:

\dfrac{x}{9}=\dfrac{5}{x}             <em>cross multiply</em>

x^2=(9)(5)\to x=\sqrt{(9)(5)}\\\\x=\sqrt9\cdot\sqrt5\\\\x=3\sqrt5

3 0
3 years ago
Is a triangle possible with the angles 125, 20, 35
BlackZzzverrR [31]

Answer:

Yes

Step-by-step explanation:

A triangle could be made with those angles because they equal 180 degrees. 125 + 20 + 35 = 180 degrees

If this answer is correct, please make me Brainliest!

8 0
3 years ago
Read 2 more answers
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