The answer is $6700
When you round these numbers to the nearest 100, you get $1300, $1300, $2100 and $1000. When you add these numbers together you get $6700.
Hope this helps!
Answer:
Two questions:
Question 1:
given
.
Answer 1: 
Question 2:
given
.
Answer 2: 
Step-by-step explanation:
So
is used in most classes to represent the inverse function of
.
The inverse when graphed is a reflection through the y=x line. The ordered pairs
on
implies
are on
.
This means we really just need to swap x and y.
Since we want to write as a function of x we will need to solve for y again.
Question 1:

Swap x and y:

We want to solve for y.
Add 3 on both sides:

Make the left hand side a fraction so we can cross-multiply:

Cross multiply:

Simplify right hand side:

Divide both sides by (x+3):

So
.
Question 2:

Swap x and y:

Make left hand side a fraction so we can cross multiply:

Cross multiply:

We have to distribute here:

Add 3x on both sides:

Divide boht sides by x:

You could probably stop here but you could also simplify a little.
Separate the fraction into two terms since you have 2 terms on top bottom being dividing by x:

Simplify second fraction x/x=1:

So
.
Answer:
2/5
Step-by-step explanation:
add all marbles together: 10 marbles
since only 4 are red, the fraction would be 4/10
4/10 can be simplified to 2/5
Answer:
10.5 cm
Step-by-step explanation:
area of parallelogram = Bh
12 x 7 = AB x 8
AB = 12x7 / 8 = 21/2 = 10.5
Answer:
9/28
Step-by-step explanation:
First transform -2 1/3 to -7/3. Then find the reciprocal of -7/3 which is -3/7. Multiply that to 3/-4 which becomes -9/-28 which equals 9/28.