Answer:
given :
24 hours = 1 day
now
60 hours = 60 / 24 = 2.5 days
After the first day, 1/3 of the original amount remained:
... (1/3)·45 = 15
After the second day, 2/3 of that amount remained:
... (2/3)·15 = 10
The bookstore has 10 copies left.
Answer:

Step-by-step explanation:
Isolate x on one side of the equation.
2(-2x-4) ← (Expand by using with distributive property.)
<u><em>DISTRIBUTIVE PROPERTY</em></u>
⇒ A(B+C)=AB+AC
⇒ A(B-C)=AB-AC
A=2
B=(-2x)
C=4
2(-2x)-2*4
-2*2x-2*4
-2*2x-2*4 (Solve.)
-2*2-2*4=-4x-8
Rewrite the equation problem.
10-x=-4x-8
10-x-10=-4x-8-10 (Subtract 10 from both sides.)
Solve.
-x=-4x-18
-x+4x=-4x-18+4x (Then, add 4x from both sides.)
3x=-18 (Solve.)
3x/3=-18/3 (Divide by 3 from both sides.)
-18/3 (Solve & Simplify.)
-18/3=-6
X=-6

Therefore, the correct answer is x=-6.
Let n be the first integer and n + 1 the next consecutive integer
5n + (n + 1)
6n + 1
Answer:
5. A. x = 4°
B. x = 100°
6. A. y = 37° , x = 74° , z = 25°
B. x = 30° , z = 150° , y = 15°
7. A and B . line l || m
Step-by-step explanation:
explanation in attachment .