First question is 1.40 because i read the question wrong
my sister said its 75p
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Step-by-step explanation:
Answer:
p ≥ -10
Step-by-step explanation:
Divide both sides by-9:
When dividing or multiplying by a negative number, always flip the inequality sign:
-9p/-9 > = 90/-9
Cancel out the negatives:
9p/9 > = 90/-9
Simplify the fraction:
p > = 90/-9
Simplify the signs:
p > = -90/9
Find the greatest common factor of the numerator and denominator:
p >= -10 · 9/ 1 · 9
Factor out and cancel the greatest common factor:
p > = -10
Let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3
Then the equation is (x-x₁)(x-x₂) = 0
If you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.
You can see that a=1 (there is just an x²)
b = (-5 -2√7 + 2√7 - 5)/3 = -10/3
c = ((-5-2√7)/3 ) * (-5+2√7)/3) = -1/3
So the equation you're looking for is: