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lora16 [44]
4 years ago
7

Solve for x. 5x^2 – 45 = 0

Mathematics
2 answers:
mamaluj [8]4 years ago
3 0

5x^2-45=0

<em>*Add 45 to both sides*</em>

5x^2=45

<em>*Divide both sides by 5*</em>

x^2=9

<em>*Take the square root of both sides*</em>

x=+/-9

Hope this helps!!

tamaranim1 [39]4 years ago
3 0

Answer:

+-3

Step-by-step explanation:

1. Add 45 to each side: 5x^2=45

2. Divide 5 on each side: x^2=9

3. Square root both sides: x= +-3

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What would be the reasonable estimate for value of m 31+m=307
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M= 276 31+276=307.
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Which two days had a ratio of 2:5 computers sold?
Nana76 [90]

Answer:

A. Wednesday to Friday

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Wednesday/Friday=6/15=2/5

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1. Write a linear equation with the given information
Readme [11.4K]

1) The equation of the parallel line in Slope Intercept Form is; y = -x - 1

2) The equation of the perpendicular line in Slope Intercept Form is;

y = ³/₂x - 4

<h3>How to write equation in Slope Intercept Form?</h3>

1) When two lines are parallel, it means their slopes are the same.

Formula for equation in slope intercept form is;

y = mx + c

where;

m is slope

c is y-intercept

Thus, slope of y = -x + 1 is m = -1.

Equation of parallel line is;

(y - (-5))/(x - 4) = -1

y + 5 = -x + 4

y = -x - 1

2) When two lines are perpendicular, it means their slopes are the negative inverse of each other. Thus;

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Read more about slope intercept form at; brainly.com/question/1884491

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2 years ago
A rectangle is 12 cm longer than it is wide. If its length and width are both decreased by 2 cm, its area is decreased by 108 cm
mario62 [17]

Let the width be "x" cm.

Then the length is "x+12" cm

And the area = x(x+12) = x^2+12x cm^2

----------------------------

Change the dimensions:

width = "x-2" cm

length = "x+10" cm

New area = (x-2)(x+10) = x^2 + 8x - 20 cm^2

------------------

Equations :

Old area - New area = 108 cm^2

x^2+12x -(x^2 + 8x - 20) = 108

4x + 20 = 108

4x = 88

x = 22 cm (original width)

x+12 = 24 cm (original length)

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3 years ago
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