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Paladinen [302]
2 years ago
9

What is the value of the expression shown below?

Mathematics
1 answer:
WARRIOR [948]2 years ago
3 0

Answer:

24

Step-by-step explanation:

(3/6) 2 + 7 × 4 - 5

0.5 × 2 + 7 × 4 - 5

1 + 7 × 4 - 5

1 + 28 - 5

29 - 5

24

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15

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3 years ago
Which expression is equivalent to 54.5-6?​
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Answer: 5-6•54

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3 0
3 years ago
you place a cup of 200f coffee on a table in a room that is 67f and 10 minutes later it is 195f. approximately how long will it
kompoz [17]
Newton's law of cooling says the rate of change of temperature is proportional to the difference between the object's temperature and the temperature of the environment.

Here, the object starts out at 200 °F, which is 133 °F greater than the environment temperature. 10 minutes later, the object is 195 °F, so is 128 °F greater than the environment. In other words, the temperature difference has decayed by a factor of 128/133 in 10 minutes.

The solution to the differential equation described by Newton's Law of Cooling can be written as the equation
   T(t) = 67 + 133*(128/133)^(t/10)
where T is the object's temperature in °F and t is the time in minutes from when the object was placed in the 67 °F environment.

The equation 
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can be solved analytically, but it can be a bit easier to solve it graphically. A graphing calculator shows it takes 42.528 minutes for the temperature of the coffee to reach 180 °F.

7 0
3 years ago
What is the square root of 647
mars1129 [50]

Answer:

Step-by-step explanation:

Air pressure is measured in pascals. For a professional American football game, the ball should be inflated to about 90,000 pascals. Scientists studied the effects of air temperature on the pressure inside American footballs by taking these steps:

1. Prepare 100 footballs.

2. Measure each football's air pressure.

3. Divide footballs into 10 groups.

4. Place the groups in different lockers cooled to different air temperatures.

5. After 12 hours, remove the footballs from lockers.

6. Measure each football’s pressure again.

7. Compare the new pressures to the starting pressures.

What two terms best describe the variable "air pressure inside the football" in this experiment?

independent, qualitative

independent, quantitative

dependent, qualitative

dependent, quantitative

5 0
3 years ago
Read 2 more answers
I need help simpifying 5x-2/4-25x^2
Lyrx [107]

Answer:

−25x^2+5x−1/2

Step-by-step explanation:

5 0
3 years ago
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