Answer:
x = 3
y = 6
Step-by-step explanation:
2x = x + 9
x = 3
y = 2 * 3
y = 6 . Hope this help teehee :D
First one is choice 1 second one is choice 3
So xy=-60 and x+y=-28
x+y=-28 also means x=-28-y
subsitute x=-28-y for x in xy=-60
(-28-y)y=-60
-28y-y^2=-60
add negative y^2 to both sides
-28y=-60+y^2
add 28y to both sides
0=y^2+28y-60
factor
0=(x-2)(x+30)
we set them to zero
x-2=0
x=2
x+30=0
x=-30
the numbers could be -30 and 2
Answer:
Option D is the correct answer.
Step-by-step explanation:
the time out.
Time taken for back = t-1
We have plane's average speed out was 300 mph and average speed on the way back was 350 mph.
That is
Dividing both equations
Time taken for back = t-1 = 7-1 = 6 hours.
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