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3 years ago

Which are the solutions of the quadratic equation?

Mathematics

2 answers:

pochemuha3 years ago

8 0

X= 9+√105/2, 9-√105/2

aivan3 [116]3 years ago

6 0

So here just plug values into the quadratic formula x= -b+- sqr b^2-4ac / 2a

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Find perimeter of rectangle when length = 4.6m and breadth = 360cm

ivann1987 [24]

Answer:

16.4 m²

Step-by-step explanation:

length = 4.6 m

breadth = 360 cm = 360 ÷ 100 = 3.6 m

Perimeter = 2*(l + b)

= 2 * ( 4.6 + 3.6)

= 2 * 8.2

= 16.4 m²

7 0

3 years ago

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Solve 7x- c= k for x. <br>A. X = 7(k+C) <br>B. x = 7(K-C) <br>C. X = k+c/7 <br>D. X= k-c/7

antoniya [11.8K]

Answer:

Step-by-step explanation:

you add c to both side which will then make it 7x=k+c then you would divide 7 from both sides leaving you with x=k+c/7. Except 7 will be under the k and c.

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3 years ago

HELP I NEED HELP ASAP

jarptica [38.1K]

Answer:

Step-by-step explanation:

tsgsgsgs sorry if wrong

8 0

3 years ago

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If the value of n nickels plus d dimes is c cents, what is n in terms of d and c?

uysha [10]

Answer: n=c-d

Step-by-step explanation: n+d=c so n=c-d

8 0

3 years ago

I NEED HELP PLEASE, THANKS! :)

Elena L [17]

Answer:

First option is the right choice.

Step-by-step explanation:

$\frac{1}{\cos \left(x\right)+1}+\frac{1}{\cos \left(x\right)-1}\\\\\frac{\cos \left(x\right)-1}{\left(\cos \left(x\right)+1\right)\left(\cos \left(x\right)-1\right)}+\frac{\cos \left(x\right)+1}{\left(\cos \left(x\right)+1\right)\left(\cos \left(x\right)-1\right)}\\\\=\frac{\cos \left(x\right)-1+\cos \left(x\right)+1}{\left(\cos \left(x\right)+1\right)\left(\cos \left(x\right)-1\right)}\\\\=\frac{2cos\left(x\right)}{cos^2\left(x\right)-1}\\\\=\frac{2cos\left(x\right)}{sin^2\left(x\right)}$

$=2\cdot \frac{cos\left(x\right)}{sin\left(x\right)}\cdot \frac{1}{sin\left(x\right)}\\\\=-2cot(x)csc(x)$

Best Regards!

7 0

3 years ago