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1 year ago

Which table of ordered pairs represents a proportional relationship?

Mathematics

1 answer:

grin007 [14]1 year ago

7 0

Answer:

It is the second one

Step-by-step explanation:

A proportional relationship happens when you get the same answer every time that you divide the y by the x.

(2,10) (4,20) (6,30)

10/2 = 5

20/4 = 5

30/6 = 5

That is not true for the other tables.

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AB and BC form a right angle at point B if A = (-3,-1) and B = (4,4) what is the equation if BC

sergejj [24]

Answer:

$7x+5y-48=0$

Step-by-step explanation:

Refer the attached figure .

We are given a line AB

Point A $=(x_1,y_1) = (-3,-1)$

Point B $=(x_2,y_2) = (4,4)$

Formula for slope 'm' when two points are given :

$m=\frac{y_2-y_1}{x_2-x_1}$

Substituting thew values

$m=\frac{4-(-1)}{4-(-3)}$

$m=\frac{5}{7}$

Since we are given that AB is perpendicular to BC

So, By property - perpendicular slopes are negative reciprocals of each other.

$\Rightarrow m_1\times m_2 =-1$

$\Rightarrow \frac{5}{7}\times m_2 =-1$

$\Rightarrow m_2 = \frac{-7}{5}$

So, Slope for line BC : $m_2 = \frac{-7}{5}$

Point B = (4,4)

Formula of equation of line : $y-y_1=m(x-x_1)$

$y-4=\frac{-7}{5}(x-4)$

$5(y-4)=-7(x-4)$

$5y-20=-7x+28$

$7x+5y-20-28=0$

$7x+5y-48=0$

Hence the equation of line BC : $7x+5y-48=0$

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2 years ago

Can anyone help this is a hard question.

dolphi86 [110]

The answer is c.......

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2 years ago

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What is the length of the unknown side of the right triangle? (1 point)

Angelina_Jolie [31]

C, the answer is C.. trust me

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2 years ago

What is the probability of drawing a blue marble? 3/7 70% 1/3 3/10

vazorg [7]

Answer:

3/10

Step-by-step explanation:

There are 20 marbles. 6 of them are blue.

P = 6/20 = 3/10

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3 years ago

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True or false? The degree of a binomial is always equal to 2

wel

Answer:

false

Step-by-step explanation:

the degree is found by looking at the term with the highest exponent of the variable..

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3 years ago

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