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3 years ago

HELPPPPPPPEPEPEPEPEEPPE

Mathematics

2 answers:

Inessa05 [86]3 years ago

5 0

Answer:

y = -2x -8

Step-by-step explanation:

The equation for a line can be written in slope intercept form

y =mx+b where m is the slope and b is the y intercept

the slope is -2 and the y intercept is -8

y = -2x -8

Nikitich [7]3 years ago

3 0

y=-2x-8 because the slope is -2

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please help me. how would you change x + 3y = 18 -3x -12y = -75 to eliminate y showing all of the work

Svetlanka [38]

Answer:

x = -3

y = 7

Step-by-step explanation:

x + 3y = 18

-3x - 12y = -75

multiply first equation by 4

4 × (x + 3y) = 18 ➡ 4x + 12y = 72

now add the two equations up

4x + 12y - 3x -12y = 72 - 75 (-12y will eliminate 12y)

x = -3

5 0

3 years ago

What are the zeros of the function below? F(x)= (x-1)(x+1)/6(x-4)(x+7)

Lisa [10]

Answer:

+1 and -1

Step-by-step explanation:

The function in this problem is:

$f(x)=\frac{(x-1)(x+1)}{6(x-4)(x+7)}$

First of all, we have to define the domain of the function, which is the set of values of x for which the function is defined.

In order to find the domain, we have to require that the denominator is different from zero, so

$6(x-4)(x+7)\neq 0$

which means:

$x\neq 4\\x\neq -7$

So the domain is all values of x, except from 4 and -7.

Now we can solve the problem and find the zeros of the function. The zeros can be found by requiring that the numerator is equal to zero, so:

$(x-1)(x+1)=0$

This is verified if either one of the two factors is equal to zero, therefore:

$x-1=0\\\rightarrow x=+1$

and

$x+1 = 0\\\rightarrow x=-1$

We see that both values are part of the domain, so they are acceptable values: so the zeros of the function are +1 and -1.

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3 years ago

The equation below describes a proportional relationship between x and y. What is the constant of proportionality?

seraphim [82]

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4 years ago

Read 2 more answers

How many different trios could be selected from a chorus of 20 singers? 20! C(20, 3) P(20, 3)

timama [110]

<u>Answer:</u>

C (20, 3) = 1140

<u>Step-by-step explanation:</u>

We are given that there is chorus of 20 singers and we are to find the number of different trios that can be selected from 20 singers.

This is a problem of combinations where the order of trios is not important.

$C ( 2 0 , 3 ) = \frac { ( 2 0 ! ) } { ( ( 2 0 - 3 ) ! 3 ! ) }$

$C ( 2 0 , 3 ) = \frac { 2 0 ! } { ( 1 7 ! ) ( 3 ! ) }$

$C ( 2 0 , 3 ) = \frac{( 2 0 \times 1 9 \times 1 8 )}{( 3 \times 2 \times 1 )}$

C (20, 3) = 1140

3 0

3 years ago

If a = { 1,2,3,...,10} and U={1,2,4,8} then find A'

yuradex [85]

Answer:

U-A empty

Step-by-step explanation:

all in a is in u in u is in a therfore empty is found on u but not in a

4 0

2 years ago