Answer:
B. 210
Step-by-step explanation:
800/560 = 1.42857142857
300/1.42857142857= 210
is the same as 
Dividing by 3 is the same as multiplying by the fraction 1/3
Answer:
$ 1 , 150
Step-by-step explanation:
<span>y=3x
2. x=-y
2x+y=-2
3. 2x+2y=4
x=10-3y
4. y=7-x
2x+3y=-1</span>
Answer:
M(5,2)
Step-by-step explanation:
We use the midpoint rule:

We just have to find the arithmetic mean of the x and y-coordinates.
The endpoints of CD are given as C(3,−5) and D(7, 9).
We substitute these values to get:



Therefore the coordinates of the midpoint M of CD are (5,2)