Answer:
x=-2, y=3. (-2, 3).
Step-by-step explanation:
x-4y=-14
x+5y=13
--------------
-x+4y=14
x+5y=13
----------------
9y=27
y=27/9
y=3
x+5(3)=13
x+15=13
x=13-15
x=-2
Answer (<u>assuming it can be in slope-intercept form)</u>:
Step-by-step explanation:
1) First, find the slope of the line by using the slope formula, 
. Substitute the x and y values of the given points into the formula and solve:
So, the slope is -12.
2) Now, use the point-slope formula 
to write the equation of the line in point-slope form. Substitute real values for 
, 
and 
.
Since represents the slope, substitute -12 in its place. Since and represent the x and y values of a point the line intersects, choose one of the given points (any one is fine, it will equal the same thing at the end) and substitute its x and y values into the formula as well. (I chose (2,4), as seen below.) Finally, isolate y to put the equation in slope-intercept form to find the following answer:
Answer:
50%
Step-by-step explanation:
Divide the amount sold by the total amount started out
63/126 = .5
multiply by 100 to get into percent form
Answer:645 kilometers per hour
Solution.
Let v be the speed of the plane flying east!
Then, the speed of the plane flying west is v+75.
Since the planes are 5460 kilometers apart by 7 pm est,
(7-3)*(v+(v+75))=5460
2v+75=1365,
2v=1290,
v=645
answer: 645
