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3 years ago

Which of the following best describes the graph of y=-x^2

Mathematics

2 answers:

astraxan [27]3 years ago

8 0

Answer:

Step-by-step explanation:

to draw the graph of y = - x²............(1)

the above given equation is the equation of parabola.

now, comparing this equation (1) will general equation of parabola which is

x² = 4 a y

a = -1/4

this means the parabola vertex is at origin (0,0)

parabola will be open downward.

the graph shown is the required graph.

AlexFokin [52]3 years ago

6 0

Show me the graphs. I have the answer.

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Which shows the expression below simplified? 0.00028 ÷ (7 × 10-4)

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3 years ago

Find (a) the number of subsets and (b) the number of proper subsets of the set.

vaieri [72.5K]

Answer:

(a) Total No. of Subsets = 128

(b) Total No. of Proper Subsets = 127

Step-by-step explanation:

First we need to define the set of days of the week.

Set of Days of Week = {Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday}

It is evident from the set of days of the week, that it contains 7 elements.

(a)

The total no. of subsets of a given set is given by the following formula:

Total No. of Subsets = 2^n

where,

n = no. of elements of the set = 7

Therefore,

Total No. of Subsets = 2^n

Total No. of Subsets = 2^7

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(b)

The total no. of proper subsets of a given set is given by the following formula:

Total No. of Proper Subsets = (2^n) - 1

where,

n = no. of elements of the set = 7

Therefore,

Total No. of Proper Subsets = (2^n) - 1

Total No. of Proper Subsets = (2^7) - 1 = 128 - 1

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