**Answer:**

Its already solved, -4+25 does equal -4+25

**Step-by-step explanation:**

Hi, We know:

Sin(a + b) = 2.Sin(a).Sin(b)

Then,

= 2Sin(a).Cos(b)/Cos(a).Cos(b)

Canceling Cos(b)

= 2Sin(a)/Cos(a)

As Tan(a) = Sin(a)/Cos(a)

Then we will stay:

= 2Tan(a)

Or

= Tan(a) + Tan(a)

There is anything wrong on the alternatives

**Answer:**

4

**Step-by-step explanation:**

**Answer:**

x-intercepts (3,0)

y-intercept (0,-12)

x= 3

y= -12

**Step-by-step explanation:**

$2.40 for binding

10 cents ($0.10) per page

cost=binding+pagescost

binding=2.40

pagescost=costperpage X number of pages=0.10*n if n=number of pages

so

cost=0.10n+2.40

or

C(x)=0.10n+2.40

the fixed cost is the binding