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3 years ago

6

Emmanuel has 745 pictures in his phone his memory is getting full so he starts deleting 20 pictures everyday if I need to be abl

e to write an algebraic expression to describe the number of pictures of phone his phone after any given number of days

1 answer:

Lelechka [254]3 years ago

3 0

PhotosRemaining(x) = 745 pictures - (20 pictures/day)*(x), for x≥0

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Does X^2+x+1 have any real roots?

algol [13]

Answer:

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Step-by-step explanation:

This is a very famous equation which does not have real roots but have two complex roots i.e w ( omega) and w^2(omega square ).these roots have a special importance from complex number point of veiw. These roots have following properties whivh makes this roots more interesting that are

w•w^2=1

w^2 = 1/w

w^3n =1 ,where n is any integer

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5 ducks to 30 geese fraction form

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Answer:

5/30

Step-by-step explanation:

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4 years ago

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For the function y=x^2-4x-5, perform the followingtasks:

lbvjy [14]

Answer:

a. $x^2-4x-5= \left(x-2\right)^2-9$ .

b. The axis of symmetry for ${\left(x - 2\right)^{2}} - 9$ is $x=2$ .

Step-by-step explanation:

a. The vertex form of a quadratic is given by $y=a(x-h)^2+k$ , where (h, k) is the vertex.

To convert from $y=x^2-4x-5$ form to vertex form you use the process of completing the square.

Step 1: Write $x^2-4x-5$ in the form $x^2+2ax+a^2$ . Add and subtract 4:

$x^{2} - 4 x - 5=x^{2} - 4 x + {\left(4\right)} - {4} - 5$

Step 2: Complete the square $x^2+2ax+a^2=\left(x+a\right)^2$

${\left(x^{2} - 4 x + 4\right)} - 9={\left(x - 2\right)^{2}} - 9$

b. The graph of a quadratic function is a parabola. The axis of symmetry of a parabola is a vertical line that divides the parabola into two congruent halves. The axis of symmetry always passes through the vertex of the parabola. The x-coordinate of the vertex is the equation of the axis of symmetry of the parabola.

For a quadratic function in standard form, $y=a(x-h)^2+k$ , the axis of symmetry is $x=h$ .

The axis of symmetry for ${\left(x - 2\right)^{2}} - 9$ is $x=2$ .

Look at the graph shown below.

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3 years ago

The scale of a map is 1¼ inch = 35 miles. If the distance from two points are 140 miles apart, how far are they away on the map?

slavikrds [6]

Answer:

5 inches

Step-by-step explanation:

140 / 35 = 4 x 1.25 = 5 inches

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3 years ago

1. How many solutions can a linear system of equations have?

ASHA 777 [7]

Answer:

<h2>D. All of the Above</h2>

Step-by-step explanation:

Since a linear system might have 0, 1 , or many solutions, the correct answer is d.

I'm always happy to help :)

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