Answer:
<h3>Each of the given matrix equations does not represent this system of equations.</h3>
Step-by-step explanation:
-216 is the right answer!
,178. in my head not edtinstoon
Answer:
<h2>D. 5 hours</h2>
Step-by-step explanation:
rt=d
rt+rt=900
80t+100t=900
180t=900
18t=90
2t=10
t=5
5 hours
80*5+100*5=900
Answer:
Option B. 0.783 pounds
Step-by-step explanation:
step 1
Find the area of a a 36 inch piece of PVC pipe with an outside diameter of 0.82 inches and an inside diameter of 0.75 inches
The area of a circle is equal to
we have
assume
substitute the values
step 2
Find the volume of the piece of PVC
Multiply the area by its length
step 3
Find the weight of the piece of PVC
Multiply the volume by its density
The density is
so