All categories

3 years ago

6x - 9= y y= -3x using the system of linear equation by substitution Help please! This is due really soon

Mathematics

1 answer:

solniwko [45]3 years ago

6 0

Answer:

x = 1 and Y = -3

Step-by-step explanation:

Rewrite equations:

y=−3x;6x−9=y

Step: Solvey=−3xfor y:

y=−3x

Step: Substitute−3xforyin6x−9=y:

6x−9=y

6x−9=−3x

6x−9+3x=−3x+3x(Add 3x to both sides)

9x−9=0

9x−9+9=0+9(Add 9 to both sides)

9x=9

(Divide both sides by 9)

x=1

Step: Substitute1forxiny=−3x:

y=−3x

y=(−3)(1)

y=−3(Simplify both sides of the equation)

Answer:

x=1 and y=−3

You might be interested in

When the crispy treats have cooled Mrs. Williams cut theme into 30 equal pieces and she give 2/5 to her son and takes the rest t

stiv31 [10]

Answer: Mrs, William takes 18 treats to school.

Step-by-step explanation:

Given: When the crispy treats have cooled Mrs. Williams cut theme into 30 equal pieces .

She give 2/5 to her son, then the number of treats ahe give to her son = $\frac{2}{5}30=12$

Then, the number of treats Mrs. Williams take to school = $30-12=18$

Hence, Mrs, William takes 18 treats to school.

6 0

2 years ago

Write the equation of a line in slope intercept form that passes through the point ( -8, 2) and is parallel to the line y=1/4x−3

mel-nik [20]

Y-2=1/4(x+8) is your answer
Explanation
Desmos

6 0

2 years ago

Which of the following is a valid comparison between the possible minimum and maximum values of the function y = -x2 + 4x - 8 an

Arturiano [62]

Answer:

The maximum value of the equation is 1 less than the maximum value of the graph

Step-by-step explanation:

We have the equation $y=-x^2+4x-8$ .

We can know that this graph will have a maximum value as this is a negative parabola.

In order to find the maximum value, we can use the equation $x=\frac{-b}{2a}$

In our given equation:

a=-1

b=4

c=-8

Now we can plug in these values to the equation

$x=\frac{-4}{-2} \\\\x=2$

Now we can plug the x value where the maximum occurs to find the max value of the equation

$y=-(2)^2+4(2)-8\\\\y=-4+8-8\\\\y=-4$

This means that the maximum of this equation is -4.

The maximum of the graph is shown to be -3

This means that the maximum value of the equation is 1 less than the maximum value of the graph

6 0

3 years ago

You are creating a collage of black-and-white and color photographs. Each black-and-white photo costs $3 to print and each color

Reil [10]

Answer:

6 black and white photos

9 color photos

Step-by-step explanation:

1. black and white photo = $3

2. color photo = $2

find number of each photo that will give you at least 12 photos

1. $3*6 = $18

2. $2*9 = $18

3. $36 = 15 photos (6 black and white, 9 color)

7 0

3 years ago

What's 70x 9/10 show work

Tanya [424]

9/10 = 0.9
70 x 0.9 = 63

4 0

3 years ago

Read 2 more answers