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solve these questions.

Please refer to step-by-step.

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

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.

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

Now we solve for the y-intercept.

6x + 3y = -9

6(0) + 3y = -9

Now for the slope.

3y = -6x - 9

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

17. x - y = 4

Let's start with the x-intercept.

x - y = 4

x - 0 = 4

Now we solve for the y-intercept.

x - y = 4

0 - y = 4

-y=4

Now for the slope.

x - y = 4

-y = -x + 4

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

18. 3x + 4y = 12

Let's start with the x-intercept.

3x + 4y = 12

3x + 4(0) = 12

Now we solve for the y-intercept.

3x + 4y = 12

3(0) + 4y = 12

Now for the slope.

3x + 4y = 12

4y = -3x + 12

19. -7x + 2y = -16

Let's start with the x-intercept.

-7x + 2y = -16

-7x + 2(0) = -16

Now we solve for the y-intercept.

-7x + 2y = -16

-7(0) + 2y = -16

Now for the slope.

-7x + 2y = -16

2y = -7x - 16

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

Now for the slope.

x - 5y = 55

-5y = x + 55

step-by-step explanation:

126.66 m²

step-by-step explanation:

the pertinent area formula is a = πr², where r is the radius.

here, a = π(6.35 m)² = 40.32π, or approximately 126.66 m²