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Serjik [45]
1 year ago
10

7x²+4x-1 evaluate the expression

Mathematics
1 answer:
marissa [1.9K]1 year ago
4 0

Answer:

here

Step-by-step explanation:

 

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Which shows 0.23 repeated as a fraction.<br> A. 2/33 <br> B. 7/33 <br> C. 23/99 <br> D. 7/30
sergij07 [2.7K]

Answer: c

Step-by-step explanation: 23/99 as a fraction

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3 years ago
A 6 cm long spring extends to 9 cm when a 1 kg load is suspended from it. What would be its length if a 2 kg load were suspended
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Answer:

12 cm

Step-by-step explanation:

To calculate the length of a spring with a 2 kg load, compare the displacement of a 1 kg load and adjust accordingly.

When a 1 kg load is suspended from the spring, the spring which is 6 cm stretches to 9 cm. This is 3 cm longer due to the weight. If you attach a weight which is twice as much then the displacement will be twice as much. Instead of stretching an additional 3 cm, it will stretch 2*3 = 6 cm. Add this to the length of the spring and it stretches in total 6 + 6 = 12 cm.

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2 years ago
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Rama09 [41]

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Step-by-step explanation:

each lap is 1 3/8 times that by 3

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so would be 4.125

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