Are the lines y=7x+15 and y=7x+4 perpendicular, parallel, and explain.

The lines would be parallel because their slopes are the same and their y-intercepts are different.

Step-by-step explanation:

First, start with the two equations:

y = 7x + 15

y = 7x + 4

So for lines to be parallel, they must have the same slope. For lines to be perpendicular, one of the lines must be the negative reciprocal of the other. In other words, it should be the opposite sign (+ or -) and the reciprocal (flip the numerator and denominator.

In this case, the lines are in slope-intercept form:

y = mx + b

so the slope is already given.

Slope of line 1 = 7x

Slope of line 2 = 7x

Because these lines have the same slope but different y-intercepts, they would be parallel to each other. You can check this by graphing it.

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)