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Gnoma [55]
3 years ago
11

What is y-13x=9 and how did you solve it

Mathematics
1 answer:
AURORKA [14]3 years ago
4 0

Simplifying

y + -13x = 9

Reorder the terms:

-13x + y = 9

Solving

-13x + y = 9

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1y' to each side of the equation.

-13x + y + -1y = 9 + -1y

Combine like terms: y + -1y = 0

-13x + 0 = 9 + -1y

-13x = 9 + -1y

Divide each side by '-13'.

x = -0.6923076923 + 0.07692307692y

Simplifying

x = -0.6923076923 + 0.07692307692y

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3 years ago
The monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical, normal distribution. Th
e-lub [12.9K]

Answer:

95% of monthly food expenditures are between $110 and $190.

Step-by-step explanation:

Given : The monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical, normal distribution. The sample mean is $150 and the standard deviation is $20.

To find : Using the Empirical rule, about 95% of the monthly food expenditures are between which of the following two amounts?

Solution :

At 95% of the data is between two standard deviation to left and right of the mean is given by,

To the left side, \bar{x}-2\sigma

To the right side, \bar{x}+2\sigma

We have given,

The sample mean \bar{x}=\$150

The standard deviation \sigma=\$20

Substitute in the formula,

\bar{x}-2\sigma

=150-2(20)

=150-40

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\bar{x}+2\sigma

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Therefore, 95% of monthly food expenditures are between $110 and $190.

6 0
3 years ago
Solve the quadratic in form equation x^4-14x^2+45=0
Anastaziya [24]
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Answer:Given expression : a(x-y)-b(x-y)

Now, (x-y) is common in both terms.

First factor is (x-y).

∴a(x−y)−b(x−y)=(x−y)(a−b)

If you are reading this hope you have a wonderful day and may your dreams come true!

Good luck

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Step-by-step explanation:

4 0
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