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stiv31 [10]
3 years ago
7

Represent the following algebraically. A number, x, decreased by the sum of 2x and 5

Mathematics
1 answer:
sashaice [31]3 years ago
8 0
The answer is x-(2x+5) 
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m_a_m_a [10]

Answer:

6π cm³

Step-by-step explanation:

V = Ah ( A is the base area and h the height ), then

3πh = 18π ( divide both sides by 3π )

h =  = 6

Then the height of the smaller cylinder = 6 - 3 = 3 cm

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Step-by-step explanation:

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2 years ago
Lin runs 5 laps around a track in 6 minutes.
egoroff_w [7]

it would be a ratio5:6

Step-by-step explanation:

6 0
3 years ago
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Viktor [21]

Answer: C

Step-by-step explanation:

3 0
3 years ago
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Which is a prime number 31 85 49 70
avanturin [10]

Answer:

31, can you help me with my questions please

6 0
3 years ago
Read 2 more answers
A particular computer takes 43 nanoseconds to carry out five sums and seven products. It takes 36 nanoseconds to carry out four
laila [671]
This is the concept of simultaneous equations:
Let the time taken to do one sum be x and time taken to do one product be y.
Total time taken to do 5 sums and seven products will be:
5x+7y=43

Total time taken to do 4 sums and 6 products will be:
4x+6y=36

This gives us the simultaneous equations:
5x+7y=43
4x+6y=36

multiply the top equation by 4 and the bottom equation by 5 then subtract the bottom equation from the top gives us:
-2y=-8
thus:
y=4 
next
multiply the top equation by 6 and the bottom equation by 7 then subtract the bottom from the top equation gives us:
-2x=-6
hence;
x=3
therefore:
Total time taken to do 1 sum is x=3 nanoseconds
Total time taken to do 1 product is y=4 nanoseconds

7 0
3 years ago
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