If you meant to write y=23x-4 then none of the lines are perpendicular.
I suspect you intended y=2/3x-4, then line D, y=-3/2x-4 is perpendicular.
For any line y=mx+b, you have to "invert" m to get a perpendicular line. Inverting in this case means: flip numerator and denominator and add a minus sign.
So 2/3 becomes -3/2, hence answer D.
The 'inverted' m is called the opposite reciprocal. That's your word of the day.
800-50=750 so 750+50=800 the dryer maybe go be 750
Answer:
Step-by-step explanation:
Right triangle:
height h, width w, hypotenuse h
Area is: 
Pytagoras theorem: 
In this question:
To find the area, in terms of h and t, we have to write w as a function of h and t. So
So the area is:
