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Aleksandr [31]
3 years ago
13

Factorise completely

Mathematics
1 answer:
Andreyy893 years ago
4 0
1. Number that adds up to -12 and multiplied by the same # that gives u -13. Set it up like this because both are negative so, u need 1 negative and 1 positive.
(x-13)(x+1)

2. Same rule applies. GCF
8y(4y+1)

3. (x+3)(x-3)
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gulaghasi [49]
I think the answer is C 1 2/3
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A village wishes to measure the quantity of water that is piped to a factory during a typical morning. A gauge on the water line
anzhelika [568]

Answer:

570 m³

Step-by-step explanation:

The volume of water is the product of flow rate of water and the time taken. We are to get the volume of water used between 6 am and 9 am, that is for 3 hours (9 - 6).

We are given the flow rate at 6 am and the flow rate at 9 am, but this flow rate changes between 6 am and 9 am. To get the estimate of the water used, Let us assume that it flows at the same flow rate as it was at 6 am throughout, hence:

V_L= 100 m^3/h * 3h=300\ m^3

Also, let us assume that it flows at the same flow rate as it was at 9 am throughout, hence:

V_R= 280 m^3/h * 3h=840\ m^3

To get the best estimate of the total volume, let us find the average of the two values, hence:

Volume=\frac{V_L+V_R}{2} =\frac{300+840}{2}=570\ m^3

3 0
3 years ago
Please help me solve this!!
Brut [27]

Answer:

30

by-step explanation:

5*5=30

3 0
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HELP!! correct answer gets brainliest
Llana [10]

Answer:

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Step-by-step explanation:

3 0
3 years ago
The problem -2x=9 equals the answer x=-4.5...is that correct or incorrect?
erastovalidia [21]
-2x=9|:(-2)\\&#10;x=-4.5&#10;

Yes.
5 0
3 years ago
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