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ioda
3 years ago
15

How do i factor -7x^2+5x+12

Mathematics
1 answer:
yKpoI14uk [10]3 years ago
6 0

Answer:

-(x + 1)(7x - 12)

Step-by-step explanation:

Step 1: Factor out a -1

-1(7x² - 5x - 12)

Step 2:

Think. Answer this question: "What 2 numbers multiply up to -12 and adds up to -5 while 7 is an x coefficient?". You answer should be -12 and 1.

So, <em>factor</em>.

-1(x + 1)(7x - 12)

To double check, just expand/FOIL everything and see if it is the same as the original expression.

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How do you solve (Arc)QPT if &lt;QZT = 120
yuradex [85]
By definition, the arc length is given by:
 arc = R * theta * ((2 * pi) / 360)
 Where,
 theta: angle in degrees
 R: radio
 We have then:
 (Arc) QPT if <QZT = 120:
 theta = 360-120 = 240 degrees
 R = 13.5 units
 Substituting values we have:
 (Arc) QPT = R * theta * ((2 * pi) / 360)
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 Answer:
 
(Arc) QPT = 56.55 units
7 0
3 years ago
HELPPPP PLSSSSSSSSSSSSSSSSSSSS
forsale [732]

Answer:

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5 0
3 years ago
I need help breaking this down
sergeinik [125]

Answer:

see explanation

Step-by-step explanation:

Given

2cosΘ - \sqrt{2} = 0 ( add \sqrt{2} to both sides )

2cosΘ = \sqrt{2} ( divide both sides by 2 )

cosΘ = \frac{\sqrt{2} }{2}

Since cosΘ > 0 then Θ is in first and fourth quadrants, hence

Θ = cos^{-1} ( \frac{\sqrt{2} }{2} ) = \frac{\pi }{4}

OR

Θ = 2π - \frac{\pi }{4} = \frac{7\pi }{4}

solutions are Θ = \frac{\pi }{4}, \frac{7\pi }{4}

3 0
3 years ago
Read 2 more answers
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3 years ago
Shahid is going to use these instructions to make a fizzy drink. Shahid thinks that he has 400 ml of orange juice and 200 ml of
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Answer:

Shahid would need 160 ml. of lemonade, and would have 40 ml. left over for later use.

Step-by-step explanation:

4 0
3 years ago
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