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Maslowich
3 years ago
11

Please help me with this problem. I am not sure if I am correct.

Mathematics
1 answer:
jek_recluse [69]3 years ago
3 0

Answer:

only -7

Step-by-step explanation:

Just plug them in.

so for x=-7 \sqrt{-2(-7)-5}=(-7)+4\\\sqrt{9}=-3 \\ 3=-3So this one is extraneous

Then if you plug -3 in you get 1 = 1 so this one is not extraneous.  if you need me to work this one out let me know.  

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Round 52961 to one significant figure
Aneli [31]

Answer: 50000

Step-by-step explanation:

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

Rules for significant figures:

Digits from 1 to 9 are always significant and have infinite number of significant figures.

All non-zero numbers are always significant. For example: 654, 6.54 and 65.4 all have three significant figures.

All zero’s between integers are always significant. For example: 5005, 5.005 and 50.05 all have four significant figures.

All zero’s preceding the first integers are never significant. For example: 0.0078 has two significant figures.

All zero’s after the decimal point are always significant. For example: 4.500, 45.00 and 450.0 all have four significant figures.

Thus 52961 when rounded off to one significant figure will be 50000.

7 0
3 years ago
Can someone plzz help me on thiss!
aev [14]

Answer:

A

Step-by-step explanation:

because it goes up constantly by 12

5 0
3 years ago
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avanturin [10]

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3 0
3 years ago
Write an equivalent expression by factoring.<br><br>5x + 15​
nata0808 [166]

Answer:

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5 0
3 years ago
Find the distance between (2,4) and (12, 9) on a coordinate plane. round to the nearest tenth if necessary. *
atroni [7]
Use pythagoras

d = √(Δx² + Δy²)
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The nearest tenth is 11.2, so the distance is near to 11.2
4 0
3 years ago
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