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2 years ago

11

What is the number of solutions of 4x^2+12x+9=0?

1 answer:

Gwar [14]2 years ago

7 0

Answer:

One Real number solution

Step-by-step explanation:

check the discriminant

12^2 - 4*4*9

b^2 - 4ac

...

144 - 16*9 = 0

one double root

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Graph y > 1 -3x<br> A<br> B<br> C<br> Or D

bazaltina [42]

Answer:

D (You got it right.)

Step-by-step explanation:

Whenever the sign is facing them we will always shade the top. Then we have to find the slope which in this case would be 3(the number that is being multiplied by x. Lastly is the sign does not have a line under it or an equal sign. it won't be a straight line it will have little gaps.

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2 years ago

Need help if anybody can help.

Darina [25.2K]

Answer:

46.5

Step-by-step explanation:

Of all straight angles have 180 degrees in them.

So, to find x we need to form this equation:

x + 65 + x - 22 = 180

2x + 43 = 180

2x = 180-43

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1 year ago

The dot plot shown represents the number of students enrolled in each of the 16 courses at a community college. A new course has

suter [353]

Answer:

select a b and c

Step-by-step explanation:

they are all false

7 0

2 years ago

Read 2 more answers

Solve y′′=sin(x) if y(0)=0 and y′(0)=5.<br><br> y(x)=?

Ksenya-84 [330]

Answer:

$y(x)=6x-sin(x)$

Step-by-step explanation:

Rewrite the differential equation as:

$\frac{d^{2} y }{dx^{2} } =sin(x)$

Integrate both sides with respect to x:

$\int\ \frac{d^{2} y }{dx^{2} } dx = \int\ sin(x) dx$

$\frac{dy}{dx} =-cos(x)+C_1$

Integrate one more time both sides with respect to x:

$\int\ \frac{dy}{dx} = \int\ -cos(x)+C_1 dx$

$y(x)=-sin(x)+C_1x+C_2$

Now that we find the solution, let's find its derivate:

$y'(x)=C_1-cos(x)$

Evaluating the initial conditions:

$y(0)=C_1(0)+C_2-sin(0)=0\\C_2=0$

$y'(0)=C_1-cos(0)=5\\C_1=5+1=6$

Replacing the value of the constants that we found in the differential equation solution:

$y(x)=6x-sin(x)$

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2 years ago

a piece of yellow yarn was 230 inches long. after 90 inches had been cut from it, the piece of yellow yarn was twice as long as

AlladinOne [14]

The yellow yarn was 160 inches longer than the blue yarn.

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2 years ago