2 years ago

I HAVE A COMMON ASSESSMENT HELP PLZ!

Mathematics

1 answer:

Kitty [74]2 years ago

3 0

Answer:

A. Reflection

Step-by-Step Explanation:

you're reflecting the line across the x-axis, and that transforms f(x) into g(x).

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I need help with this question

mariarad [96]

Answer:

133

Step-by-step explanation:

Answer is 133

6 0

3 years ago

Read 2 more answers

A welder drops a piece of red-hot steel on the floor. The initial temperature of the steel is 2,500 degrees Fahrenheit. The ambi

sergey [27]

Answer: After 18.05 minutes, the temperature of steel becomes 100 degrees.

Step-by-step explanation:

Since we have given that

Initial temperature = 2500

At t = 0,

we get that

$f(t)=Ce^{-kt}+80\\\\2500=C+80\\\\2500-80=C\\\\2420=C$

After 2 minutes, the temperature of the steel is 1500 degrees.

so, it becomes,

$1500=2420e^{-2k}+80\\\\1500-80=2420e^{-2k}\\\\\dfrac{1420}{2420}=e^{-2k}\\\\0.587=e^{-2k}\\\\\ln 0.587=-2k\\\\-0.533=-2k\\\\k=\dfrac{0.533}{2}\\\\k=0.266$

So, We need to find the number of minutes when the temperature of steel would be 100 degrees.

So, it becomes,

$100=2420e^{-0.266t}+80\\\\100-80=2420e^{-0.266t}\\\\20=2420e^{-0.266t}\\\\\dfrac{20}{2420}=e^{-0.266t}\\\\\ln \dfrac{20}{2420}=-0.266t\\\\-4.8=-0.266t\\\\t=\dfrac{4.8}{0.266}\\\\t=18.05$

Hence, after 18.05 minutes, the temperature of steel becomes 100 degrees.

7 0

2 years ago

10. Makenzie is at the bakery. She sees a sign that says 8 pastries cost

kotegsom [21]

Answer:

$100

Step-by-step explanation:

8x= 160

160/8 = 20

x=20

5x = 100

3 0

2 years ago

Estimate the following sum using front-end estimation.<br><br> 48.1 + 29.7 + 11.8

Daniel [21]

Rounding up when the decimal is above 5, Rounding down when the decimal is 5 and below

the answer you are looking for would be 48 + 30 + 12 = Approximately 80 estimate

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2 years ago

You pick a card from a standard deck, look at it, then pick a second card. Since a standard deck of 52 cards has 13 hearts and 1

Snezhnost [94]

Answer: it’s answer c

Step-by-step explanation:

4 0

2 years ago