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lana [24]
4 years ago
7

Year Costs (£)

Mathematics
2 answers:
lara [203]4 years ago
8 0

Answer:

1.8 million

Step-by-step explanation:

Add everything up to get 9 million, then divide by 5 to get the average of the years. This leaves you with 1.8 million

m_a_m_a [10]4 years ago
3 0

Answer:

The mean =  £ 1.8 million.

Step-by-step explanation:

This is the total sum of the costs / the number of years.

= (1.4 + 1.6 + 1.8  + 2.5 + 1.7) / 5   million pounds.

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15 POINTS: A motorboat traveling downstream covers the distance between port M and port N in 6 hours. Once, the motorboat stoppe
pav-90 [236]

Answer: S=18

Step-by-step explanation:

D = distance between M and N  

S = speed of the boat  

S + 2 = speed down streem  

S - 2 = speed upstream  

T = time on the downstream leg until the boat made its turn  

9-T= time on the upstream leg  

6(S + 2) = D  

T (S + 2) = D - 40  

(9-T)(S-2) = D - 40  

now we have 3 equations and 3 uknowns  

lets multply everything out  

6S + 12 = D  

ST + 2T = D - 40  

9S - 18 - ST + 2T = D - 40  

add the second 2 together to get rid of the ST term  

9S - 18 + 4T = 2D - 80  

and lest subtract them from one annother  

2ST - 9S + 18 = 0  

if we can find T in terms of S we will have a quadratic equation, and will be able to use the quadratic formula / factor

9S - 18 + 4T = 2(6S + 12) - 80  

9S - 18 + 4T = 12 S + 24 - 80  

4T = 3S - 38  

T = 0.75 S - 9.5  

2S(0.75 S - 9.5) - 9S + 18 = 0  

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8 0
3 years ago
Please help!!<br> I need it quick!!!
sladkih [1.3K]

Answer:

-13 \frac{13}{25}

Step-by-step explanation:

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Now, multiply the numerators by the numerators and the denominators by the denominator and keep it aligned so the products stay in fraction form. now you should have \frac{-468}{35} .

Divide the numerator by the denominator to get the whole number, in this problem that comes out to 13. The remainder of this division becomes the new numerator which in this case would also be 13 and the denominator stays the same so now you have -13\frac{13}{35} which is the answer

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Answer:

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Step-by-step explanation:

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