187k views
1 vote
Help!! Please please answer quickly and in the next 9 hours!

Solve these questions.

Help!! Please please answer quickly and in the next 9 hours! Solve these questions-example-1
User Franck E
by
6.9k points

1 Answer

1 vote

Answer:

Please refer to step-by-step.

Explanation:

Let's solve all of these one at a time.

15. -2x - y = -5

To find the x-intercept, we need to equate the value of y to 0.

-2x - 0 = -5


(-2x)/(-2)=(-5)/(-2)


x=2.5

To find the y-intercept, we need to equate the value of x to 0.

-2(0) - y = -5

Now since we cannot have a negative value, we need to divide both sides by -1.


(-y)/(-1)=(-5)/(-1)


y=5

To find the slope form, we can simply transpose the value of -2x to the other sides of the equal sign.

-y = 2x - 5

Now we cannot have a negative value for the slope, we need to divide both sides by -1, leaving us with.

y = -2x + 5

16. 6x + 3y = -9

Let's start with the x-intercept.

6x + 3y = -9

6x + 3(0) = -9


(6x)/(6)=(-9)/(6)


x=1.5

Now we solve for the y-intercept.

6x + 3y = -9

6(0) + 3y = -9


(3y)/(3)=(-9)/(3)


y = -3

Now for the slope.

3y = -6x - 9

Now we need to divide all our variables by 3 to get y.


(3y)/(3)=(-6x)/(3)-(9)/(3)


y=-2x-3

17. x - y = 4

Let's start with the x-intercept.

x - y = 4

x - 0 = 4


x=4

Now we solve for the y-intercept.

x - y = 4

0 - y = 4

-y=4


(-y)/(-1)=(4)/(-1)


y = -4

Now for the slope.

x - y = 4

-y = -x + 4

We need to divide all our variables by -1 to get y.


(-y)/(-1)=(-x)/(-1)+(4)/(-1)


y=x-4

18. 3x + 4y = 12

Let's start with the x-intercept.

3x + 4y = 12

3x + 4(0) = 12


(3x)/(3)=(12)/(3)


x=4

Now we solve for the y-intercept.

3x + 4y = 12

3(0) + 4y = 12


(4y)/(4)=(12)/(4)


y = 3

Now for the slope.

3x + 4y = 12

4y = -3x + 12


(4y)/(4)=-(3x)/(4)+(12)/(4)


y=-(3x)/(4)+3

19. -7x + 2y = -16

Let's start with the x-intercept.

-7x + 2y = -16

-7x + 2(0) = -16


(-7x)/(-7)=(-16)/(-7)


x=-2(2)/(7)

Now we solve for the y-intercept.

-7x + 2y = -16

-7(0) + 2y = -16


(2y)/(2)=(-16)/(2)


y=-8

Now for the slope.

-7x + 2y = -16

2y = -7x - 16


(2y)/(2)=-(7x)/(2)-(16)/(2)


y=-(7x)/(2)-8

20. x - 5y = 55

Let's start with the x-intercept.

x - 5y = 55

x - 5(0) = 55

x = 55

Now we solve for the y-intercept.

x - 5y = 55

0 - 5y = 55


(-5y)/(-5)=(55)/(-5)


y=-11

Now for the slope.

x - 5y = 55

-5y = x + 55


(-5y)/(-5)=-(x)/(-5)+(55)/(-5)


y=-(x)/(5)-11

User George Huang
by
6.9k points