7. Slope of AD = 4/16 = 1/4
8. ΔAEC = 3/12 = 1/4
.. ΔDFB = 2/8 = 1/4
9. The angles at E, G, and F are right angles. Lines CE and BF are parallel, so the alternate interior angles at B and C where the transversal AD crosses them are equal. The triangles of interest are similar by AA~.
10. See problem 7. The ratio is the same.
11. Hard to tell what rule they want you to state. Every axis-aligned right triangle with its hypotenuse on AD will have the same ratio of side lengths. (That's one of the features of the graph of a line. It has the same slope everywhere, measured over any distance.)
Answer:
$9.5
Step-by-step explanation:
All you have to do is divide 19 by 2 to get the cost of one pillow. I hope this helps :)
Answer:

Step-by-step explanation:
Given:
The function is given as:

The possible rational roots for a function
using the Rational Root Theorem is given as:

Here, 
Factors of -15 = 
Factors of 3 = 
Now, possible roots are given as:

Therefore, option 1 is correct.
Answer:
true
Step-by-step explanation:
the sum remains same if order is changed