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3 years ago

Can someone give me the best broken down way to solve these questions?

Mathematics

1 answer:

sdas [7]3 years ago

7 0

Answer:

6 inches.

Step-by-step explanation:

Set up a proportion and solve for the missing variable.

$\frac{2}{5}=\frac{x}{15}\\\\15(\frac{2}{5})=15(\frac{x}{15})\\\\6=x$

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X = (1/2) / (5/8)

When dividing fractions, you reverse the second fraction and multiply:

X = (1/2) x (8/5)

X = 8/10

Simplify:

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3 years ago

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What is the domain of the function f(x) =x+1/<br> X^2-6x+8?

SpyIntel [72]

Answer:

The domain of the function is all real values of x, except $x = 4$ and $x = 2$

Step-by-step explanation:

We are given the following function:

$f(x) = \frac{x+1}{x^2-6x+8}$

It's a fraction, so the domain is all the real values except those in which the denominator is 0.

Denominator:

Quadratic equation with $a = 1, b = -6, c = 8$

Using bhaskara, the denominator is 0 for these following values of x:

$\Delta = (-6)^2 - 4(1)(8) = 36-32 = 4$

$x_{1} = \frac{-(-6) + \sqrt{4}}{2} = 4$

$x_{2} = \frac{-(-6) - \sqrt{4}}{2} = 2$

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3 years ago

What is the answear for 5xy+4y-z+3xy

Irina18 [472]

Answer:

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Step-by-step explanation:

Add values with the same variables; in this case xy

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