Hi can someone please help me I need help please help me thank you

The lines are reflections of each other.

Step-by-step explanation:

The slope of the first line is 2/5.

The slope of the second one is -2/5.

The lines are reflections of each other.

the lines are perpendicular

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Given

x - 2y + 8 = 0 ( subtract x + 8 from both sides )

- 2y = - x - 8 ( divide all terms by - 2 )

y = x + 4 ← in slope- intercept form

with slope m =

Given also

2x + y + 1 = 0 ( subtract 2x + 1 from both sides )

y = - 2x - 1 ← in slope- intercept form

with slope m = - 2

Parallel lines have equal slopes

The slopes are not equal thus the lines are not parallel.

For lines to be perpendicular the product of their slopes = - 1

× - 2 = -1

Thus the 2 lines are perpendicular.

7

step-by-step explanation:

d

step-by-step explanation:

hello and welcome!

so, when we see the words "proportional" along with a table, we need to know that we're looking numbers that divide by the same thing.

looking at this table, we simply have to do a trial and error, and divide to see which numbers have the same quotient. if you look at choice a & c, they both have equal quotients for three of the numbers, with one exception, so those can't be the answer. looking at b, there is no similarity, so that can't be it. then, we see d; if you divide all the numbers in the table, you'll see that they all divide by two, which is a proportional relationship, and our answer!

also, always remember that the x will always be the number that goes into y, and somewhere behind this table, is a formula. for this specific table, the formula would be:

since our x-value is being divided by two to get the y-value. and if they were to ask for more numbers in the series, this is the formula you would use to find them.