Choose the equation of the horizontal line that passes through the point (-2,-1).

a.) y = -1

b.) y = -2

c.) x = -2

d.) x = -1

  A.)  y = -1

Step-by-step explanation:

The equation of a horizontal line is ...

  y = constant

To make that line go through the point (x, y) = (-2, -1), the constant must match the y-coordinate of the point: -1.

  y = -1

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9