What the statement means is that x^2 + kx + 2k = 0 when x = -3. That's because x + 3 will equal zero
(-3)^2 + (-3k) + 2k = 0
9 - 3k + 2k =0
9 - k = 0
9 = k
Check
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x^2 + 9x + 18 = 0
(x + 3)(x + 6) = 0
These are the two factors. As expected from the givens one of them is (x + 3)
Answer:
£9000
Step-by-step explanation:
= £10 000×<u> </u><u> </u><u>5</u><u> </u><u> </u>×2
100
= 1000
= £10 000-1000
= £9000
Answer:
1/2
Step-by-step explanation:
Mark the 2 x1, the 6 y1, the 12 x2, and the 11 y2
Write the y2- the y1 divided by the x2- the x1
11-6 = 5
12-2 = 10
Simplify
5/10 = 1/2
Answer:
84%
Step-by-step explanation:
The mean has 50% below the mean and 50 % above the mean
The mean is 103.47
The standard deviation is 4.07
Add the mean and the standard deviation
103.47+4.07 = 107.54
We want to know how much data is below the mean plus one standard deviation
Within one standard deviation is 68% , but that is on both sides, we are only needed on the right side so we need 1/2 of the 68 = 34
50+34 = 84
Answer:
Because it's measure the speed according to the car distance traveled and not the direction of the car movement.
Step-by-step explanation:
The newer cars have digital speedometers; the display would register as a forward speed while backing; and the odometer a positive distance as well. ... In those cars the odometer could run in reverse, subtracting miles.
There actually are simple... The newer cars have digital speedometers; the display would register as a forward speed while backing; and the odometer a positive distance as well. ... In those cars the odometer could run in reverse, subtracting miles
