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sergey [27]
2 years ago
11

This is quadratic equations Help asap!!

Mathematics
1 answer:
lord [1]2 years ago
3 0

Answer:

x = - 3 ± \sqrt{2}

Step-by-step explanation:

x² + 6x + 7 = 0 ( subtract 7 from both sides )

x² + 6x = - 7

using the method of completing the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(3)x + 9 = - 7 + 9

(x + 3)² = 2 ( take square root of both sides )

x + 3 = ± \sqrt{2} ( subtract 3 from both sides )

x = - 3 ± \sqrt{2}

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Two ducklings wander away from the nest while their mother is away. The first duckling's displacement (distance and direction) f
aksik [14]

the second duckling is wandering by 2.6 units distance than the first duckling .

<u>Step-by-step explanation:</u>

Here we have , Two ducklings wander away from the nest while their mother is away. The first duckling's displacement (distance and direction) from the nest is (12,5) The second duckling's displacement is (13,-8) . We need to find How much farther did the second duckling wander than the first duckling. Let's find out:

Let a = (12,5) and b =(13,-8)

The distance each duckling wandered is the magnitude of its displacement vector. Therefore, the expression Distance second duck wandered is given by :

⇒ D  = |b|-|a|

⇒ D  = \sqrt{13^2+(-8)^2} -\sqrt{12^2+5^2}

⇒ D  = \sqrt{233} -\sqrt{169}

⇒ D  =15.26 -13

⇒ D  =2.6

Therefore , the second duckling is wandering by 2.6 units distance than the first duckling .

4 0
3 years ago
Solve by factoring or finding square roots x^2-18x-40=0
irina1246 [14]

Answer:

Step-by-step explanation:

8 0
3 years ago
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Which answer is it? Plz show work
Vesnalui [34]
Your answer would be B
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Can someone help me ?
Alex Ar [27]
All you need to do is divide 2.25 by 2!

The answer is  1.125!

I hope this helps! :)


5 0
3 years ago
If each interior angle of a regular polygon measures 144 degrees, how many sides does the polygon have?
LuckyWell [14K]
180(n-2)=n*144 in our casesolving for n we obtain:36n = 360n=10 sidesCHECK!!!!!!!!!!!!!!!!!!!
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