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3 years ago

Need help with 9(c) plzzz

Mathematics

1 answer:

MAVERICK [17]3 years ago

5 0

Since we are given the values for both rows only in the second column, we can use this to solve for the rest of the missing values. Simply divide 3 by 2.49 and multiply that resultant by and multiply that by any missing value for cookies to find the missing cost. In order to solve for the cookies when cost is given, divide 2.49 by 3 and multiply that resultant. I will solve for the first, third, and fourth columns.

3/29=1.2
For column 1, 1.2*1=1.20
For column 3, 1.2*20=24.10
For column 4, 1.2*100=12.00

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Check whether the relation R on the set S = {1, 2, 3} is an equivalent

kozerog [31]

Answer:

$R$ isn't an equivalence relation. It is reflexive but neither symmetric nor transitive.

Step-by-step explanation:

Let $S$ denote a set of elements. $S \times S$ would denote the set of all ordered pairs of elements of $S\!$ .

For example, with $S = \lbrace 1,\, 2,\, 3 \rbrace$ , $(3,\, 2)$ and $(2,\, 3)$ are both members of $S \times S$ . However, $(3,\, 2) \ne (2,\, 3)$ because the pairs are ordered.

A relation $R$ on $S\!$ is a subset of $S \times S$ . For any two elements $a,\, b \in S$ , $a \sim b$ if and only if the ordered pair $(a,\, b)$ is in $R\!$ .

A relation $R$ on set $S$ is an equivalence relation if it satisfies the following:

Reflexivity: for any $a \in S$ , the relation $R$ needs to ensure that $a \sim a$ (that is: $(a,\, a) \in R$ .)

Symmetry: for any $a,\, b \in S$ , $a \sim b$ if and only if $b \sim a$ . In other words, either both $(a,\, b)$ and $(b,\, a)$ are in $R$ , or neither is in $R\!$ .

Transitivity: for any $a,\, b,\, c \in S$ , if $a \sim b$ and $b \sim c$ , then $a \sim c$ . In other words, if $(a,\, b)$ and $(b,\, c)$ are both in $R$ , then $(a,\, c)$ also needs to be in $R\!$ .

The relation $R$ (on $S = \lbrace 1,\, 2,\, 3 \rbrace$ ) in this question is indeed reflexive. $(1,\, 1)$ , $(2,\, 2)$ , and $(3,\, 3)$ (one pair for each element of $S$ ) are all elements of $R\!$ .

$R$ isn't symmetric. $(2,\, 3) \in R$ but $(3,\, 2) \not \in R$ (the pairs in $\! R$ are all ordered.) In other words, $3$ isn't equivalent to $2$ under $R\!$ even though $2 \sim 3$ .

Neither is $R$ transitive. $(3,\, 1) \in R$ and $(1,\, 2) \in R$ . However, $(3,\, 2) \not \in R$ . In other words, under relation $R\!$ , $3 \sim 1$ and $1 \sim 2$ does not imply $3 \sim 2$ .

3 0

2 years ago

HELP HELP HELP 6 = x/8<br><br> The question is what is "x"?

german

Answer:

x= 48

Step-by-step explanation:

Multiply 8 by 6 to get x by itself and you get your answer.

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3 years ago

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PLEASE HELP WITH THIS MATHS QUESTION thank you :D

trasher [3.6K]

A)106°- angle at the centre is half of the angle at the circumference

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3 years ago

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Nimfa-mama [501]

Answer:

a. 0

Step-by-step explanation:

1. To find the slope given two points, use the following formula:

$\frac{y^{2}- y^{1} }{x^{2}-x^{1} }$

2. $y^{2}$ would be the second y-value (in the second ordered pair), 2, and $y^{1}$ would be the first y-value (in the first ordered pair), also 2.

3. Same for the x-values. $x^{2}$ is -2 and $x^{1}$ is 4

4. Now plug in the values.

$\frac{2-2}{(-2)-4}$

5. This equals $\frac{0}{-6}$ which simplifies to 0

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2 years ago

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Please HELP!!:) 2. Of the 200 species of birds found in the refuge, 96 have been

dusya [7]

Answer:

48%

Step-by-step explanation:

96 out of the 200 species of birds have been seen nesting. To make it easier, let's make it out of a hundred. Just divide both numbers by 2, this will result in the ratio being 48 out of 100. Now, we have our percentage, 48%.

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2 years ago

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