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Anettt [7]
3 years ago
12

Solve for x: 7.2x = 14.4

Mathematics
2 answers:
kherson [118]3 years ago
8 0
7.2x=14.4
7.2x/7.2= 14.4/7.2
x=2
andriy [413]3 years ago
7 0

<em><u>Answer:</u></em>

x = 2

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

In the equation 7.2x = 14.4, to find x, we first want to isolate the variable.

It would be a little easier if there were no decimals so:

7.2x = 14.4

We could multiply both sides by 10 to get rid of the decimals

7.2x * 10 = 14.4 * 10

72x = 144

We then can divide both sides by 72

72x/72 = 144/72

<u><em>x = 2</em></u>

^ is your answer

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I need help for this
Leona [35]
Got you
S' = 4,-3
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3 years ago
The diameter of a circle has length 12. The center is at*(-5, 2). Give the equation
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Answer:

Equation of the circle is : x^{2} + 10x + y^{2} -4y -7 =0

Step-by-step explanation:

Let us consider the image attached in the answer area.

The center<em> O</em> has the co-ordinates i.e. <em>(-5,2)</em> and the diameter given is <em>12 units</em>.

We know that radius is half of diameter.

\text{Radius = }\dfrac{\text{Diameter}}{2}

\text{Radius = }\dfrac{12}{2}\\\Rightarrow \text{Radius = 6units}

The equation for circle given the center and radius, can be represented as:

(x-a)^{2}+ (y-b)^{2} = r^{2}

Where <em>(a,b)</em> is the co-ordinate of center and <em>r</em> is the radius.

Let us consider the following formula:

(p+q)^2 = p^{2}+ q^{2} +2pq\\(p-q)^2 = p^{2}+ q^{2} -2pq

(x-(-5))^{2}+ (y-2)^{2} = 6^{2}\\\Rightarrow (x+5)^{2}+ (y-2)^{2} = 36\\\Rightarrow x^{2} + 25 + 10x +y^{2} + 4-4y=36\\\Rightarrow x^{2} + 10x +y^{2} -4y-7=0

Hence, Equation of the circle is : x^{2} + 10x + y^{2} -4y -7 =0

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2 years ago
Raj builds a side table in the shape of a cube. Each edge of the cube measures 21 inches. Raj wants to cover the top and four si
elena-s [515]

Answer: 2000/25 = 80 tiles

Step-by-step explanation:

Date: s=20

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the surface area to be covered with tiles is requires, the base is not included, so the equation reduces: surface area = 5s*2

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2000/25 = 80 tiles

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2 years ago
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