On a coordinate plane, line A has a negative slope, line b is horizontal, line c is vertical, and line d has a positive slope. Which line has a slope of zero?
Line a
Line b
Line c
Line d

Line b

Step-by-step explanation:

It cannot be line a or line d because the line will have a constant rate of change. It cannot be line c because line c would be undifined. Therefore, it must be line b.

b or 2, just plug these equations into your graphing calculator then check the graph to see the image. if it matches up then that's your answer!

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.