Start by converting your two equations into slope-intercept form.
3x - 3y = -9
-3y = -3x -9 Subtract 3x from both sides
y = x +3 Divide both sides by -3
2x + y = 9
y = -2x + 9 Subtract 2x from both sides.
Then graph both lines (in which case the point where they intersect is the solution) or substitute in each point until both equations are true.
In this case the solution is (2,5); both equations become 5=5 when you substitute in the point's coordinates.
Answer:
Faster jet = 650
Slower jet = 650 - 89 = 561
Step-by-step explanation:
Given
total distance apart = 4844
t = 4 hours
r1 = r
r2 = r - 89
Equations
d = r * t
r*t + (r - 89)*t = 4844
Solution
r*4 + (r - 89)*4 = 4844
4r + 4r - 356 = 4844 Combine the left
8r - 356 = 4844 Add 356 to both sides
8r = 4844 + 356
8r = 5200 Divide both sides by 8
r = 5200/8
r = 650
Answer:
330 cubic meters
Step-by-step explanation:
A rectangular prism's volume is length * width * height.
The bottom box's volume is 6*8*5 = 240 cubic meters
The top box's volume is 3*5*6 = 90 cubic meters. (6 can be found from the bottom box's width.)
Add the two volumes together to get the total: 330 cubic meters