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3 years ago

Which of the points A(6, 2), B(0, 0), C(3, 2), D(−12, 8), E(−12, −8) belong to the graph of direct variation y= 2/3 x?

Mathematics

2 answers:

Juliette [100K]3 years ago

7 0

Answer:

Plot the graph and the points.

You can see B, C and E belong to the graph,

adelina 88 [10]3 years ago

4 0

Answer:

B, C and E.

Step-by-step explanation:

y = 2/3 x.

B(0,0) is one point because when y = 0 , 0 = 2/3 x giving x = 0 *3/2 = 0.

We now try to see which other points fit the equation:

A (6,2): 2 = 2/3 * 6 = 4 so it's NOT A.

C (3,2): 2 = 2/3 * 3 = 2 So It is C.

D (-12,8) : 8 = 2/3 * -12 = -8 so its NOT D.

E. (-12,-8) -8 = 2/3 * -12 = -8 , So it is E.

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A student solved the given equation and justified every step except one. What is the missing reason? A) Associative property of

Anna007 [38]

Given:

The statements and reasons to solve an equation.

To find:

The missing reason.

Solution:

If a, b and c are three real number, then

Associative property of addition : $(a+b)+c=a+(b+c)$

Commutative property of addition : $a+b=b+a$

Multiplicative property of equality : $a=b\Leftrightarrow ca=cb$

Distributive property of multiplication over addition : $a(b+c)=ab+ac$

In the given step, $(x+-3)+3$ is written as $x+(-3+3)$ .

It means, only parenthesis are changed, which is possible by Associative property of addition.

So, the missing reason is Associative property of addition.

Therefore, the correct option is A.

3 0

3 years ago

Help please<br> Please explain if possible.

RideAnS [48]

Answer:
12+(9+20)

(20+9)+12

9+(20+12)

(9+12)+20

Explanation:
The associative property of addition is saying that if three or more numbers are added, the answer won’t change if you add or move parentheses.

So if the question is 1+2+3, the answer will be the same even if you write it as (1+2)+3 or 1+(2+3) or 2+(1+3) and so on.

3 0

4 years ago

61 is 115% of what number?

Valentin [98]

61 is 115% of 53.04, because 61 divided by 1.15( Which is the same as 115%) equals 53.04.

5 0

3 years ago

If n(A-B)=18,n(AuB)=70 and n(AnB)=25 then find n(B)

svp [43]

n(A-B) denotes elements which are in A but not in B

n(Au B) denotes elements in A and B

n(AnB) denotes elements that are common in A and B

Now I will add one more set

n(B-A) which denotes elements in B but not in A

So, n(AuB) = n(A-B) + n( B-A) +n(AnB)

70 = 18 +n(B-A) + 25

70 = 43 + n(B-A)

n(B-A) = 70-43

n(B-A) = 27

So, n(B) = n( B-A) + n( AnB)

= 27+25

= 52

4 0

3 years ago

2. William said that when you multiply three positive and negative decimals, the answer changes depending on where you place the

Pavlova-9 [17]

Yes it does due to the rules of PEMDAS. You have to do what is in the parentheses first so if you change whats in them, your going to get a different product <span />

7 0

3 years ago

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