Using the process of elimination, we will be able to determine the answer. So, 5x+3y=-10 multiply it by *3 to change the equation into 15x+9y=-30. Then to change 3x+5y=-6 multiply it by *5, to change it into 15x+25y=-30. So now with these two equations 15x+9y=-30 and 15x+25y=-30, use subtraction to get rid of the variable x.
Thus,
15x+9y=-30
-
15x+25y=-30
which will leave you with
-16y=0
thus, y=0
Then, plug y back into the original equation to find x
5x+3(0)=-10
5x=-10
x=-2
Thus the point of intersection is (-2,0)
-2 being the x, and y being 0.
Rational numbers can be negatives and positives. When negative, they are called integers. If you add one negative number that is higher than the positive number, it can be negative. For instance: -63+3= -60
Jason is correct.
Is that what you wanted to know? I hope this helps.
A. Since we know that
is the altitude a football will reach t seconds after it is kicked, we are going to replace the altitude
in our equation and solve for
. If the equation has any positive real solutions, we can conclude that the given value is possible.
We know from our problem that the given value is
, so lets replace that value in our equation and solve for
:
Solving for
:
or
We can conclude that
the given value, h=16, is possible. In fact, the ball reaches that height two times: at
and
.
B. Just like before, we are going to replace the given value,
, in our equation
, and then, we are going to solve for
to check if the given value is possible. If the equation has any positive real solutions, we can conclude that the given value is possible.
Solving for
:
or
Since the equation doesn't have any real solutions, we can conclude that
the given value, h=20, is not possible.
Answer:
1.5 liters = 1500 Milliliters