a) 4/(4+5)
b) There are a total of 7 'units' (3+4). The unit of girls is 1 more than boys. That means 1 unit represents 120.
1 : 120
7 : x
cross multiply and solve.
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Maths, Addmaths and Statistics: Post your doubts here!
- Thread starter OakMoon!
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b) There are a total of 7 'units' (3+4). The unit of girls is 1 more than boys. That means 1 unit represents 120.
1 : 120
7 : x
cross multiply and solve.
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Nearest tenth of a degree? Isn't it supposed to be 10? :/
D = 0.5 * 20 * u
= 10u
2D = 20u
we already have 10u so we need to know the time by after which it travels another 10u
from the graph, it's t = 30s ( area of rectangle = 10 * u)
Nearest ten degrees = 10
Nearest tenTH of a degree = 1/10
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distance travelled in the first 20 sec
1/2 (20)(u) =10u (area under the graph)
D=10u.....> eq 1
the car has travelled 2D meters at time t seconds from the start.
i.e distance travelled in the first t seconds =area under trapezium
2D= 1/2 (u)(t+t-20)
substitute the value of D from eq 1 and solve ull get the answer
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Question 11 b part.
Question 24, can anyone construct the locus please?
Question 11 b part.
Question 24, can anyone construct the locus please?
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Can somebody tell that f- common difference formula, I just forgot. :/
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0 = x^2 + x -12
solve to get 2 values for x. Negative one will be l and positive one will be m.
For 24, draw a circle of radius 5 cm, center C then the angle bisector of B. P will be the point where the angle bisector cuts the circle inside the triangle.
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Yeah.
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Thanks a lot.
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Thanks.
part a is solved above.
b) Acceleration from t 0 to 20 = u/20
Deceleration = (u/20)/2 = u/40
a = (final velocity - initial velocity)/time
- u/40 = (u/4 - u)/t
-ut = 10u - 40u
-ut = -30u
t = 30
That's 30 seconds since deceleration started so total time = 60 + 30 = 90s
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Q24:
At first i thought to make a bisector of A,but before uploading i reread it....you can see for yourself.
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heres a question with its m.s i dont know where m i making mistake but in the last part of the question i dont think so 4 would be included but it is here in the marking scheme
can anybody solve the last part only ??
plz
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Question 17 b part, anyone?
Question 17 b part, anyone?
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"g (0)" means the value of x = 0
g (0) = 15 means, when the value of x is "0", (2x – 3) (x + k)= 15
do it this way, by putting 0 instead of variable x.
Once u find value of k, as u see g (x)=0
(2x – 3) (2x – 3)= 0 now.
so we say either (2x – 3) = 0, or (2x – 3)= 0
thats it. do it urself