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Mila [183]
3 years ago
6

Factor this polynomial -3x^2-16x-5 ​

Mathematics
1 answer:
dlinn [17]3 years ago
6 0
The answer is -(3x+1)(x+5)
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It would take 5 taps 150 mins to fill a pool.
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250 mins

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The county water department charges a service fee of $10.15 plus $0.005 for each gallon of water used. The inequality shown is u
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Find the value of x in the triangle
SashulF [63]

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A triangle and a square are drawn on dotty paper with dots 1 cm apart. What is the area of the region coloured red? ​
Anna71 [15]

Answer:

≈ 0.9 cm²

Step-by-step explanation:

I don't know if there is any easier way to solve this, I use 8th grade slope and line method to solve. suppose A is on origin, then the coordinates of triangle ABC are (0,0) (1,3) (4,1) and polygon DEFGH intersect line BC at F and G.

F is the intersect of y=2 and line BC, while G is intersect of x=3 and line BC.

Line BC: pass (1,3) and slope (m) = (1-3)/(4-1) = - 2/3,    

F(x,2)

(2-3) / (x-1) = -2/3            

2x-2 = 3       x = 2.5          

*<u>F (2.5 , 2</u>)

G (3,y)

(y-3) / (3-1) = -2/3     y = 5/3      

*<u>G (3 , 5/3)</u>

*<u>point I (3 , 2</u>)

segment FI = 3-2.5 = 0.5 = 1/2

segment GI = 2 - 5/3 = 1/3

area ΔFIG = (1/2 * 1/3) / 2 = 1/12 = 0.083

area of polygon  DEFGH (region colored RED) = 1 - 0.083 = 0.917 ≈ 0.9 cm²

3 0
2 years ago
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