Solve the system by substitution.
2 answers:
Answer:
A. no solution
Step-by-step explanation:
We can use the second expression to substitute for y in the first expression. Then we have ...
1/2x +11 = -7x^2 -9x +6
Subtracting the right side, we get
7x^2 +(9 1/2)x +5 = 0
Eliminating fractions by multiplying by 2, this is ...
14x^2 +19x +10 = 0
The discriminant of this equation will tell the number and kind of roots. For a=14, b=19, c=10, the discriminant is ...
b^ -4ac = 19^2 -4·14·10 = 361 - 560 = -199
Since this value is negative, we know the two roots to the quadratic will be complex. There are no real solutions.
The graph in the attachment shows the two curves do not intersect, hence there are no values of x that will make the y-values match.
Answer:
- no solution
Step-by-step explanation:
We can use the second expression to substitute for y in the first expression. Then we have ...
... 1/2x +11 = -7x^2 -9x +6
Subtracting the right side, we get
... 7x^2 +(9 1/2)x +5 = 0
Eliminating fractions by multiplying by 2, this is ...
... 14x^2 +19x +10 = 0
The discriminant of this equation will tell the number and kind of roots. For a=14, b=19, c=10, the discriminant is ...
... b^ -4ac = 19^2 -4·14·10 = 361 - 560 = -199
Since this value is negative, we know the two roots to the quadratic will be complex. There are no real solutions.
_____
The graph shows the two curves do not intersect, hence there are no values of x that will make the y-values match.
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Answer:
Kanye run faster.
Step-by-step explanation:
Given that,
Time = 1 min = 60 sec
Suppose, we find the speed of kanye and Jay.
According to number line,
Kanye covers the -160m distance and Jay covers the 140 m distance.
Negative sign shows the opposite direction.
We need to calculate the speed of Kanye
Using formula of speed
Where, v = speed
d = distance
t = time
Put the value into the formula
We need to calculate the speed of Kanye
Using formula of speed
Put the value into the formula
The speed of kanye is more than jay.
Hence, Kanye run faster.
