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zhenek [66]
3 years ago
5

Simplify- 300 - (-75)-(-4)​

Mathematics
1 answer:
tatiyna3 years ago
8 0

Answer:

-221

Step-by-step explanation:

--75=+75

--4=+4

79+(-300)

-221

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George is twice as old as Edward, and Edward's age exceeds Robert's age by 4 years. If the sum of the three ages is at least 56
marshall27 [118]

Answer:Robert's minimum age is 11 years.

Step-by-step explanation:

Let x represent George's age.

Let y represent Edward's age.

Let z represent Robert's age.

George is twice as old as Edward. It means that

x = 2y

Edward's age exceeds Robert's age by 4 years. It means that

z = y - 4

If the sum of the three ages is at least 56 years, it means that

x + y + z ≥ 56 - - - - - - - - - - 1

Substituting x = 2y and z = y - 4 into equation 1, it becomes

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8 0
3 years ago
4. Suppose you reflect a point using the y-axis as line of reflection. How would you describe its image?​
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Step-by-step explanation:

like say -2,1 would reflect as 2,1

4 0
3 years ago
If you flip three fair coins what is the probability that the two first flips will both be heads, and the third flip will be eit
Brrunno [24]

Answer:

The probability that a coin flip is a head or a tail is 0.5. The probability that a coin flip is either a head or a tail is 1. The probability that a three-coin-flip is two heads and a head or a tail is 0.25.

Step-by-step explanation:

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