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3 years ago

Solve with subsitution y-3x=2 y=-2x-8 show ur work HURRY PLSS

Mathematics

2 answers:

butalik [34]3 years ago

7 0

Answer:

(-2, -4) or x = -2 y = -4

Step-by-step explanation:

Solve with subsitution

y-3x=2

y=-2x-8

1. Substitute -2x - 8 in for the y in y - 3x = 2 (-2x - 8) - 3x = 2

2. Solve for x. Combine like terms. -5x - 8 = 2

3. Solve the one step equation. +8 +8

-5x = 10

-5 -5

x = -2

4. Substitute the -2 in for x in either equation. y = -2x - 8

y = -2(-2) - 8

y = 4 - 8

y = -4

IRINA_888 [86]3 years ago

5 0

Answer:

y-3x=2......1

y=-2x-8 ......2

substituting value of y in equation 1

-2x-8-3x=2

-5x=2+8

x=10/-5=-2

substituting value of x in equation 1

y-3×(-2)=2

y+6=2

y=2-6=-4

x=-2

y=-4

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14.4% of what number is 10.4

Helga [31]

First, convert "of" to x and put this info into an equation:

Let n represent the unknown number.

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Hope this helps!

8 0

4 years ago

The lengths of nails produced in a factory are normally distributed with a mean of 4.84 centimeters and a standard deviation of

Helga [31]

Answer:

Top 3%: 4.934 cm

Bottom 3%: 4.746 cm

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 4.84, \sigma = 0.05$