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anygoal [31]
3 years ago
8

Water in a swimming pool is treated with two chemical mixed. In a ration of 5:4. The total volume of the chemicals is 48 litres.

How much of each chemical is used?
Mathematics
1 answer:
umka21 [38]3 years ago
5 0
5:4 is equal to 26.6 : 21.3 respectively which I found by dividing 48 by 9 and then multiplying by 5 and 4.
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The following data values represent a population. What is the variance of the values? 7, 5, 11, 1, 11
MaRussiya [10]
The mean is 35/5=7

The variance is the average of the sum of squared differences of each element from the mean:

v=((7-7)^2+(5-7)^2+(11-7)^2+(1-7)^2+(11-7)^2)/5

v=(0+4+16+36+16)/5

v=14.4
3 0
3 years ago
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1000 views=£2<br> how many views are required to make £31?
dedylja [7]
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3 years ago
A landscaping company placed two orders with a nursery. The first order was for 13 shrubs and 4 trees and totaled 487. The secon
AVprozaik [17]

Answer:

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Cost of tree = 47

Step-by-step explanation:

Let

Cost of shrubs = x

Cost of tree = y

13x + 4y = 487 (1)

6x + 2y = 232 (2)

Multiply (2) by 2

12x + 4y = 464 (3)

13x + 4y = 487 (1)

Subtract (3) from (1)

13x - 12x = 487 - 464

x = 23

Substitute x = 23 into (2)

6x + 2y = 232 (2)

6(23) + 2y = 232

138 + 2y = 232

2y = 232 - 138

2y = 94

y = 94/2

= 47

y = 47

5 0
3 years ago
6 2/7 rational or irrational
Marrrta [24]

Answer:

Rational

Step-by-step explanation:

Give brainliest or at least a thanks please!

6 0
3 years ago
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Zinaida [17]
The probability is 0% because the max number that the cubes can add up to is 12 (6+6)
6 0
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