<span>(x+4)(x+1) = m+2x
x² + 5x + 4 − m − 2x = 0
x² + 3x + (4−m) = 0
Quadratic equation has exactly one real solution
when discriminant = 0
b² − 4ac = 0
3² − 4(1)(4−m) = 0
9 − 16 + 4m = 0
−7 + 4m = 0
4m = 7
m = 7/4
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Second problem:
Line y = 3 intersects graph of y = 4x² + x − 1 at point A and B
y-coordinates of points A and B = 3, since they are both on line y = 3. We need to find x-coordinates
4x² + x − 1 = 3
4x² + x − 4 = 0
x = (−1 ± √(1−4(4)(−4))) / 8
x = (−1±√65) / 8
AB = (−1+√65)/8 − (−1−√65)/8 = 2√65/8 = √65/4 = √(65/16)
m−n = 49</span>
I have take the answer from internet, I hope it help
Answer:
3 hours
Step-by-step explanation:
Since Taryn's target is $25.5 and currently has $3, she is less by 25.5-3=$22.5
Considering hourly pay of $7.5 then she needs x hours to meet her target. Equating this as 7.5x=22.5 then making x the subject of the formula we obtain that x=22.5/7.5=3 hours.
Therefore, this week, to meet the target of $25.5 for Taryne to go to the movies she needs to baby sit for 3 hours and add what she currently has, $3
Hi there!
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I believe your answer is:
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Hope this helps you. I apologize if it’s incorrect.
Answer:
I am getting no solution. Are there any answers that go with the problem?
The value of 5 in 5000 is 10 times the value of 5 in 500.
