Icannot understand this at all. for some

1) i bought apples -three for $1.49. what is the unit rate?

2) simplify: 12(5x +-12)

3) the sale price for campbell's soup is 4 for $1.24. how much would it be for six cans of soup?

4) 17+(-28)=

Step-by-step explanation:

1) 1.49/3=.49 each

2)12(5x+4)-(24-12)

60x+48-24+12 (dont forget to distribute the negative sign)

60x+36

3)1.24/4=.31

.31x6=1.86

4)17+(-28)

same thing as saying 17-28=-11

This shape is basically a rectangle and a triangle, so the area will be

Area=(area of rectangle)+(area of triangle)

We know the area of the rectangle so we can just plug that in

Area=3+(area of triangle)

The formula for the area of a rectangle is

A(rectangle)=l*w      where l=length and w=width
plug in the data we know
3=l*2
divide both sides by 2
3/2=l
1.5=l
So the length is 1.5miles. Now that we have this, we can solve for the area of the triangle.

The formula for the area of a triangle is 

A(triangle)=1/2b*h   where b=base and h=height

The height of the triangle is (4-2=2) 2 miles. Now let's solve for the area...

A(triangle)=1/2*1.5*2
A(triangle)=1.5mi²

So

Area=3+1.5
Area=4.5mi²