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4 years ago

Solve the quadratic equation by completing the square. x2 + 4x - 3 = 0

Mathematics

1 answer:

Dafna1 [17]4 years ago

5 0

$x^2 + 4x - 3 = 0$
This answer should be $x = -2 - \sqrt{7}$ , based off of Wolfram Alpha.

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Add the expressions 4 minus two-thirds b + one-fourth a and One-half a + one-sixth b minus 7. What is the simplified sum?

katen-ka-za [31]

Answer:

It is B) 3/4a-1/2b-3

Step-by-step explanation:

I did the instructions :)

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3 years ago

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If u=<2,2> then find u•u and determine whether it is a vector or a scalar

Kitty [74]

If ~v = hv1, v2, v3i and ~w = hw1, w2, w3i are vectors and c is a scalar, then (a) c~v = hcv1, cv2, cv3i (b) ~v + ~w = hv1 + w1, v2 + w2, v3 + w3i (c) ~v − ~w = hv1 − w1, v2 − w2, v3 − w3i.

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3 years ago

Answer 1-6 (about square root)

Taya2010 [7]

Answer:

1. For a cube, volume = $edge^{3}$

2. $\sqrt[3]{volume}$ = edge

3. Volume of the cube = 216 so, the edge = $\sqrt[3]{216}$ = 6

4. 1st blank = 6

2nd blank = 6

3rd blank = 216

4th blank = 216

5. 6 is the edge

6. As the room is a square and we have to find the side

Area = 121

Edge = $\sqrt[2]{121}$ = 11

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3 years ago

Use the diagram to answer the following questions.125°Lx2X+10NmZNPMdegreesmZLPMdegrees

lutik1710 [3]

For the angle MPN we know that is oposite to the angle QPL so the will be equal so:

$\angle MPN=125º$

Now with the value of MPN we can made an equation for x so:

$125=2x+10$

and we solve for x

$\begin{gathered} 125-10=2x \\ \frac{115}{2}=x \\ 57.5=x \end{gathered}$

and the angle LPM will be the complementari angle of 125 so:

$\begin{gathered} \angle LPM=180-125 \\ \angle LPM=55º \end{gathered}$

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1 year ago

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Alenkinab [10]

17.99 with 20% off 17.99*(1-20%)=14.392
40/14.392=2.779
Have to bye 3 shirts to make it more than $40.
(3*17.99*(1-20%)-10)*(1+7.5%)=35.66
Need to by 3 shirts to use the coupon. The purchase is $35.66.

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3 years ago