Answer:
33
Step-by-step explanation:
3x-1+x-1=134
4x-2=134
4x=136
x=34
34-1=33
Answer:
xc + -4x
Step-by-step explanation:
The distributive property allows the multiplication of a sum by multiplying each addend separately and then sum those products.
With this in mind, let's apply the distributive property to the expression:
x (c - 4)
= x * c + x * (-4)
= xc + -4x
Cheers.
Where <em>x </em>is the number of books sold, <em>i </em>is income, and <em>c </em>is cost:
<em>c = 4x + 3500 </em> ($4 per book plus the 3500 flat marketing fee)
<em>i = 15x </em>($15 per book)
You are looking for the point where these intersect: the intersection is where the income is equal to the cost, and at any point after that the income is greater than the cost. So, set the equations equal to each other:
<em>4x + 3500 = 15x </em>
subtract 4x from both sides
<em>3500 = 11x</em>
divide both sides by 11
<em>x = 318.181818</em>
So, you would have to sell a minimum of 319 books in order to make a profit.
Answer: (A) and (B) are the same
Step-by-step explanation:
for (A)
x-=x+4
x=x-(x+4)
x=x-x-4
x=4
for (B)
x=x+4-x
x=4
for (C)
x=x-(x+4)
x=x-x-4
x=-4
so (A) and (B) are the same because the value of their x is +4
Square root of 144 is 12
square root of 169 is 13