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inna [77]
3 years ago
7

the point (3, 6/5) lies ln the graph representing a proportional relationship. Which of the following points also lie on the sam

e graph? select all that apply. A. (1, 0.4) B. (1.5, 6/10) C. (6/5, 3) D. (4, 11/5). E. (15, 6).
Mathematics
2 answers:
Tcecarenko [31]3 years ago
8 0
A B and E all fall on the line expressed.
fenix001 [56]3 years ago
4 0

Answer:

<h2>A, B, and D.</h2>

Step-by-step explanation:

According to the problem, the point (3, 6/5) represents a proportional relationship. To find the ratio of such proportion, we just need to divide the vertical coordinate by the horizontal coordinate as follows

r=\frac{y}{x}=\frac{\frac{6}{5} }{3}=\frac{6}{15}=0.4

The ratio of the proportion is 0.4. Now, we just need to find which point has the same ratio.

<h3>A.</h3>

r=\frac{0.4}{1}=0.4

This means that point A lies on the graph because it has the same ratio.

<h3>B.</h3>

r=\frac{\frac{6}{10} }{1.5}=\frac{0.6}{1.5}=0.4

Point B also lies on the graph.

<h3>C.</h3>

r=\frac{3}{\frac{6}{5} }=\frac{15}{6}=2.5

Point C doesn't lie on the graph because it doesn't have the same ratio.

<h3>D.</h3>

r=\frac{6}{15}=0.4

Point D lies in the graph.

Therefore, all points that also lie on the same graph are A, B and D, because all of them are in the same proportion.

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Marina’s bread recipe calls for 2/3 of a cup of flour. Which amount of flour represents the same amount?
Montano1993 [528]

Answer:

4/6

Step-by-step explanation:

this is going to be your answer because 2/6 is 1/3 cup and then 4/6 is 2/3 of a cup.

5 0
3 years ago
X = 8 – 2y x + 3y = 12 What value of x satisfies the system of equations?
lora16 [44]

Answer: its 0 of 4 you can pick but i think its 4

Step-by-step explanion: i am not good at explaning this math but i know the answer

8 0
3 years ago
Find the equation of the directrix of the parabola x2=+/- 12y and y2=+/- 12x
PIT_PIT [208]

Answer:

  1. x^2 = 12 y equation of the directrix y=-3
  2. x^2 = -12 y equation of directrix y= 3
  3. y^2 = 12 x   equation of directrix x=-3
  4. y^2 = -12 x equation of directrix x= 3

Step-by-step explanation:

To find the equation of directrix of the parabola, we need to identify the axis of the parabola i.e, parabola lies in x-axis or y-axis.

We have 4 parts in this question i.e.

  1. x^2 = 12 y
  2. x^2 = -12 y
  3. y^2 = 12 x
  4. y^2 = -12 x

For each part the value of directrix will be different.

For x²  = 12 y

The above equation involves x² , the axis will be y-axis

The formula used to find directrix will be: y = -a

So, we need to find the value of a.

The general form of equation for y-axis parabola having positive co-efficient is:

x² = 4ay  eq(i)

and our equation in question is: x² = 12y eq(ii)

By putting value of x² of eq(i) into eq(ii) and solving:

4ay = 12y

a= 12y/4y

a= 3

Putting value of a in equation of directrix: y = -a => y= -3

The equation of the directrix of the parabola x²= 12y is y = -3

For x²  = -12 y

The above equation involves x² , the axis will be y-axis

The formula used to find directrix will be: y = a

So, we need to find the value of a.

The general form of equation for y-axis parabola having negative co-efficient is:

x² = -4ay  eq(i)

and our equation in question is: x² = -12y eq(ii)

By putting value of x² of eq(i) into eq(ii) and solving:

-4ay = -12y

a= -12y/-4y

a= 3

Putting value of a in equation of directrix: y = a => y= 3

The equation of the directrix of the parabola x²= -12y is y = 3

For y²  = 12 x

The above equation involves y² , the axis will be x-axis

The formula used to find directrix will be: x = -a

So, we need to find the value of a.

The general form of equation for x-axis parabola having positive co-efficient is:

y² = 4ax  eq(i)

and our equation in question is: y² = 12x eq(ii)

By putting value of y² of eq(i) into eq(ii) and solving:

4ax = 12x

a= 12x/4x

a= 3

Putting value of a in equation of directrix: x = -a => x= -3

The equation of the directrix of the parabola y²= 12x is x = -3

For y²  = -12 x

The above equation involves y² , the axis will be x-axis

The formula used to find directrix will be: x = a

So, we need to find the value of a.

The general form of equation for x-axis parabola having negative co-efficient is:

y² = -4ax  eq(i)

and our equation in question is: y² = -12x eq(ii)

By putting value of y² of eq(i) into eq(ii) and solving:

-4ax = -12x

a= -12x/-4x

a= 3

Putting value of a in equation of directrix: x = a => x= 3

The equation of the directrix of the parabola y²= -12x is x = 3

5 0
3 years ago
A circular playground for a daycare center is to be covered with square tiles that are 9 inches on each side. The circle has a d
xxTIMURxx [149]
The answer should be B. not sure on this one
3 0
4 years ago
Read 2 more answers
Which matrix multiplication is possible?
ruslelena [56]

Answer: D

Step-by-step explanation:

dim A=(a,b), dim B=(c,d), in order to multiply, c=b

1) dim A=(1,2) , dim B=(1,2) but 2≠1

2) dim A=(2,1) , dim B=(2,2) but 1≠2

3) dim A=(2,2) , dim B=(1,2) but 2≠1

4) dim A=(2,1) , dim B=(1,2) 1=1: result (2,2)

8 0
3 years ago
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