please answer both questions correctly for 7 points + i will also mark you brainliest but only if you answer both correctly.

                                      Question 12

Given

The slope-intercept form of the line equation

where m is the slope and b is the y-intercept

In our case:

substituting m = -1, and the point (-1, 5)

y = mx+b

5 = (-1)(-1) + b

5 = 1+b

b = 5-1

b = 4

Therefore, the value of y-intercept b = 4

now substituting m = -1 and b = 4 in the slope-intercept form of the line equation

y = mx+b

y = (-1)x + 4

y = -x+4

Thus, the slope-intercept of the line equation containing the point (-1, 5) and slope = -1 is:

y = -x+4

                                               Question 13

Given

The slope-intercept form of the line equation

where m is the slope and b is the y-intercept

In our case:

substituting m = 2, and the point (3, 3)

y = mx+b

3 = (2)(3) + b

3 = 6+b

b = 3-6

b = -3

Therefore, the value of y-intercept b = -3

now substituting m = 2 and b = -3 in the slope-intercept form of the line equation

y = mx+b

y = (2)x + (-3)

y = 2x-3

Thus, the slope-intercept of the line equation containing the point (3, 3) and slope = -3 is:

y = 2x-3

Therefore, option A is true.

answer: i think it is (1,-2)

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.