Y=x-4 2x+y=5 solve each system of linear equations by substitution

Mathematics

2 answers:

Elza [17]3 years ago

8 0

X = 3 and y = -1
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alisha [4.7K]3 years ago

3 0

Substitute the x-4 in to the second equation for the y:
2x+(x-4)=5
2x+x-4=5

Combine like terms and add the 4 to both sides
3x=9

Divide by 3:
x=3

Substitute the 3 in for x in either equation and solve for y:
y=3-4
y=-1

Answer:
x=3
y=-1

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How many grams are in 8 kilograms?

shutvik [7]

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5 0

3 years ago

Help please. Will put brainliest

Murrr4er [49]

Answer:

17,750
1737

Step-by-step explanation:

A suitable table or calculator is needed.

One standard deviation from the mean includes 68.27% of the total, so the number of bottles in the range 20 ± 0.16 ounces will be ...

0.6827·26,000 = 17,750 . . . . . within 20 ± 0.16

The number below 1.5 standard deviations below the mean is about 6.68%, so for the given sample size is expected to be ...

0.66799·26,000 = 1737 . . . . . below 19.76

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<em>Comment on the first number</em>

The "empirical rule" tells you that 68% of the population is within 1 standard deviation (0.16 ounces) of the mean. When the number involved is expected to be expressed to 5 significant digits, your probability value needs better accuracy than that. To 6 digits, the value is 0.682689, which gives the same "rounded to the nearest integer" value as the one shown above.