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Marianna [84]
3 years ago
12

in the morning , Emily studied 40 minutes for an exam. Later that evening, Emily studied for x more minutes. write an equation t

hat represents the total number of minutes, y, Emily studied for the exam ​
Mathematics
2 answers:
sattari [20]3 years ago
5 0

Answer: y = 40 + x

Step-by-step explanation: y is the total number of minutes Emily studied for the exam. we already know that she studied for at least 40 minutes. But we also know that y does not equal 40. with the additional amount of time, x minutes,  we can discern that y = 40 minutes plus the additional x minutes, which is simply y = 40 + x.

I hope this helped!

julia-pushkina [17]3 years ago
3 0

Answer:

40 + x = y

Just use the variables given to make an equation.

You might be interested in
-2x+11+6x<br>what's the answer​
krok68 [10]

Answer:

4x+11

Step-by-step explanation:

7 0
3 years ago
The average price of an item is $42 with a standard deviation of $3
FinnZ [79.3K]

The mean price goes between $ 41.16 and $ 42.84, so a value of $ 48 is unusually high.

Since the average price of an item is $ 42 with a standard deviation of $ 3, to find a 98% confidence interval about the mean, and determine if a value of X = 48 is unusually high or if it is normal, the following calculations should be done:

  • (((42 - 3) + (42 + 3)) / 2) x 0.98 = X
  • ((39 + 45) / 2) x 0.98 = X
  • 42 x 0.98 = X
  • 41.16 = X

  • (((42 - 3) + (42 + 3)) / 2) x 1.02 = X
  • ((39 + 45) / 2) x 1.02 = X
  • 42 x 1.02 = X
  • 42.84 = X

Therefore, as the mean price goes between $ 41.16 and $ 42.84, a value of $ 48 is unusually high.

Learn more about maths in brainly.com/question/25908442

8 0
2 years ago
Vol=1348.79cm³. What's X? (Height)
ale4655 [162]
V = PI x r^2 x H

1348.79 = 3.14 x 5.5^2 x H

1348.79 = 94.985 x h
h = 1348.79 / 94.985
h = 14.2 cm  ( round answer if needed)


4 0
3 years ago
What quantities are equivalent to 250 meters
Vsevolod [243]

Hello there,

Okay, well you have asked what quantities are equivalent to 250 meters well 250 meters would be...

  • 25000 centimeters
  • 0.25 kilometers
  • 820.20 feet

Hope I helped,

Amna

6 0
3 years ago
PLEASE LET ME KNOW (The answer ; explain if u want to)
Mrac [35]

Answer:

It takes 500 seconds for sunlight to reach Earth.

The mass of the sun is 18.98 * 10^28.

Step-by-step explanation:

Step 1) In order to solve problem number one, you would need to divide. Remember, in math in order to get from the smaller unit to the bigger unit, you divide.

Step 2) In this case, the smaller unit is the distance from the sun to earth. The bigger unit in the other hand, is the speed of light.

Step 3) 1.5 * 10^11/300,000,000 = 500

Answer: It takes 500 seconds for sunlight to reach Earth.

—

Step 1) In order to solve problem number 2, convert 26,000,000 in scientific notation which is 2.6 * 10^7.

Step 2) Now, multiply the mass of the sun by the mass of the moon.

(7.3*10^22) * (2.6 * 10^7)

Step 3) Note: whenver you multiply with exponents, you must always add them, the base remains the same.

10^22 + 10^7 = 10^29

7.3 * 2.6 = 18.98

Answer: To conclude, the mass of the sun is 18.98 * 10^28.

8 0
3 years ago
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