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3 years ago

Q16. Find x^2 + 1/x^2 , if x + 1/x = 3

Mathematics

1 answer:

erica [24]3 years ago

8 0

Answer:

$2 \times x \times \frac{1}{x} = 2 \\ {x}^{2} + {y }^{2} + 2xy = {(x + y)}^{2} \\ {x}^{2} + \frac{1}{ {x}^{2} } + 2 = {(x + \frac{1}{x} })^{2} = {3}^{2} = 9$

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4 years ago

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I need the answer in under 34 min

MissTica

Answer:

I. 1 cup is $4.50

2 cups is $9.00

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ll. 6 cups is $27.00

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Now since the number of cups is proportional to the total cost of frozen yoghurt,and the cost of 4 yoghurts cups where given .ie. $18.00

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3 years ago

Write an equation of the line in slope-intercept form that is parallel to the line y= -4 + 2 and passes through (2,4)

garik1379 [7]

Answer:

Step-by-step explanation:

If the lines are parallel, it means that the slopes are the same. To write an equation in the slope intercept form, we need the slope and the y-intercept. We are given the slope. We need to find the y-intercept. We can use the slope and the point to help us. The point is written in the form (x,y). In this case the point is (2,4) so we will use 2 for x and 4 for y.

y = mx + b Plug in what we know

4 = -4(2) + b b is what we are looking for. It is the y-intercept

4 = -8 + b Now add 8 to both sides

12 = b

Now we can write the equation:

y = -4x +12

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2 years ago