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3 years ago

Hannah owns a lemonade stand. She records her transaction throughout the day to keep

Mathematics

1 answer:

Marina CMI [18]3 years ago

3 0

Answer:

-2*3

Step-by-step explanation:

If she had to refund $2 for each cup (-2) and she refunded 3 cups (3) she would lose a balance of -2*3.

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11. The completion of a chemical reaction is expressed by the equation y = 300 - 4x - XP, where y is

alina1380 [7]

Answer:

The reaction ca occur at 10 degree Celsius or -14 degree Celsius.

Step-by-step explanation:

We are given the following in the question:

The completion of a chemical reaction is expressed by the equation

$y = 300 - 4x -x^2$

where y is the number of seconds needed to complete the reaction and x is the temperature in degrees Celsius at which the reaction occurs.

We have to find the temperature at which the reaction occurs, if the completion time of reaction is 160 seconds.

Putting y = 160

$160 = 300 - 4x -x^2\\x^2 + 4x - 140 = 0\\x^2 + 14x -10x -140 = 0\\x(x+14)-10(x+14)=0\\(x-10)(x+14) = 0\\(x-10) =0, (x+14) =0\\x = 10, x = -14$

Thus, the reaction ca occur at 10 degree Celsius or -14 degree Celsius.

5 0

3 years ago

The set O represents the minimum temperatures, in degrees Fahrenheit, recorded in the city of Orlando in a year. . . O = {49, 50

Anuta_ua [19.1K]

The union - set of all elements in O and T ( or both ):
O U T = { 49,50,52,54,55,56,59,60,61,62,65,68,70,71,72,74,75 }
Number of elements in the set O U T is 17. Answer: C )

7 0

4 years ago

Drag and drop numbers into the boxes so that the paired values are in a proportional relationship.

rusak2 [61]

I think the first box on the top is 10 and the bottom is 4. Hope this helped :)

7 0

3 years ago

If magazines cost $0.50 each, how much will 3 magazines cost?

denis23 [38]

What you want to do is do:

0.5 + 0.5 + 0.5 to find how much 3 magazines are.

So, three magazines cost $1.50

6 0

4 years ago

Read 2 more answers

Write 25 to the power of -1/11 in surd form.

tekilochka [14]

Answer:

.00363636363

Step-by-step explanation:

25^-1/11 = 1/25^1/11 = 11th root of 1/25 = .00363636363

4 0

3 years ago