3 years ago

Write an expression that is equivalent to 9 + 5x - 5 + 3x

Mathematics

1 answer:

Vladimir79 [104]3 years ago

3 0

Answer:

8x + 4

Step-by-step explanation:

change it around

9-5 5x+3x.

9-5=4, 5x+3x=8x.

4+8x or 8x+4

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What's the slope of x + 2y = 12

topjm [15]

Answer:-1 over 2.

Step-by-step explanation:

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3 years ago

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Explain why the function is discontinuous at the given number

Blizzard [7]

For $f$ to be continuous at $x=5$ , we need to have

$\displaystyle\lim_{x\to5}f(x)=f(5)$

Note that $x\to5$ means that $x\neq5$ , but that $x$ is *approaching* 5. We're told that for $x\neq5$ , we have

$f(x)=\dfrac{x^2-5x}{x^2-25}$

We can write

$\dfrac{x^2-5x}{x^2-25}=\dfrac{x(x-5)}{(x+5)(x-5)}=\dfrac x{x+5}$

and the limit would be

$\displaystyle\lim_{x\to5}\frac x{x+5}=\dfrac5{5+5}=\dfrac5{10}=\dfrac12\neq1=f(5)$

and so $f$ is discontinuous.

5 0

3 years ago

a baker used 4 cups of flour to make 5 batches of brownies.he used - of a cup of flour to make 1 batch

ELEN [110]

Answer:

4/5th of a cup of flour

Step-by-step explanation:

4 cups flour to 5 batches brownies = x cups flour to 1 batch brownies

4 / 5 = x / 1......cross multiply because this is a proportion

(5)(x) = (4)(1)

5x = 4.....divide both sides by 5

x = 4/5