So when you have something like 'split up £54 in ratio 4:5', it really just means split £54 into 4 parts and 5 parts. But we can't do that without working out 1 part.
So the way to find 1 part is to add up all the parts (4 + 5) and divide 54 by that number.
So 4 + 5 is 9, and 54 divided by 9 is 6.
So if 1 part is 6, that means 4 parts is 4 times 6, which is 24.
Equally, if 1 part is 6, 5 parts is 5 times 6, which is 30.
Therefore, £54 split up in a ratio of 4:5 is 24:30.
2) 2/10 is the probability of picking red. 5/9 is the chance of picking green the second time because one marble has been taken out. Multiply the probabilities together and should get the answer 1/9
3) I think B, C, D but C ,might not be right
Answer:
A dot plot is like a histogram but it uses dots instead of bars. Like histogram, a dot plot also presents the frequency of data points. The dot plot as described by the problem is shown in the picture. A bell shape is drawn for a symmetrical data. From the choices, the answer is: It is symmetric and has no gaps. The other statements are wrong because the peak is at $5 or $6.
15, 30, 45, 60, 75, 90, ....
<span>-2.9x + 5.4y = 140.94
answer is </span><span>y-intercept is 26.1
cause when </span><span>y-intercept x = 0
</span>-2.9(0)+ 5.4y = 140.94
<span>5.4 y = 140.94
y = 140.94 / 5.4
y = 26.1
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