You need to line the numbers up then subtract
The whole problem is in the picture. I Hope this helps
It would have to be an obtuse triangle
The answer is: [A]: 45x² + 81x + 36 .
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Explanation: Use "FOIL" technique: (First, Outer, Inner, and Last Terms);
then, combine the "like terms", to simplify.
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(5x+4)(9x+9) = 45x² + 45x + 36x + 35 = 45x² + 81x + 36 .
(which is answer choice: "A".).
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Answer:
x = - 36
Step-by-step explanation:
Given that y varies inversely as x then the equation relating them is
y =
← k is the constant of variation
To find k use the condition y = 27 when x = 12, then
k = yx = 27 × 12 = 324, thus
y =
← is the equation of variation
When y = - 9, then
- 9 =
( multiply both sides by x )
- 9x = 324 ( divide both sides by - 9 )
x = - 36