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xeze [42]
2 years ago
14

Emma is keeping track of the temperature in a pond for her science experiment. Each day, the temperature changes - 1.2 degrees .

What will the change in temperature be after 7 days?
Mathematics
1 answer:
julsineya [31]2 years ago
4 0

Answer:

after 7th day the temperature changes - 8.4 degrees.

Step-by-step explanation:

Each day, the temperature changes - 1.2 degrees. Then

  • after 1st day the temperature changes - 1.2 degrees;
  • after 2nd day the temperature changes - 2.4 degrees;
  • after 3rd day the temperature changes - 3.6 degrees;
  • after 4th day the temperature changes - 4.8 degrees;
  • after 5th day the temperature changes - 6 degrees;
  • after 6th day the temperature changes - 7.2 degrees;
  • after 7th day the temperature changes - 8.4 degrees.
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4 0
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ipn [44]
The number of roots of a quadratic function can be determined from its discriminant.

If Disc> 0, the function has two distinct roots
If Disc = 0, the function has a repeated root
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The discriminant can be calculated as:

Disc = b² - 4ac

For the given equation:

Disc = 9 - 4(2)(1) =1

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7 0
3 years ago
Factor completely 4u^2-28u+49
icang [17]

\bold{Answer}

\boxed{\bold{\left(2u-7\right)^2}}

\bold{Explanation}

  • \bold{Factor: \ 4u^2-28u+49}

\bold{---------------------}

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\bold{\left(2u\right)^2-2\cdot \:2u\cdot \:7+7^2}

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erma4kov [3.2K]

Answer:

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No

Yes

Step-by-step explanation:

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