If lines through XY and YW form a 90° angle, so that Y is a right angle,
then the product of the slopes of the lines through XY and YW must be -1
let the slopes through X,Y and Y,W be

and

respectively
so




Right answer:
Answer:

Step-by-step explanation:
Call x the amount of blinds that Manny buys.
Let's call and the amount of curtains that Manny buys
There are only 35 windows, so the number of curtains and windows can not be greater than 35.

Manny can only spend $ 2100
Then we can represent this by an inequality in the following way.

and

We can write this as a single inequality:

Finally, the set of inequalities to model this problem is:

8 7/10 as a improper fraction is 87/10
Answer:
6 - b
Step-by-step explanation:
b doesn't have a value.