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3 years ago

Evaluate the expression for w = 4, x = 9, and y = 11. Simplify your answer. w − x + y /x − y =

Mathematics

2 answers:

shepuryov [24]3 years ago

4 0

4 - 9 + 11 / 9 - 11

To solve this, I suggest using PEMDAS and starting with division. 11/9 = 1.3 (rounded).

4 - 9 + 1.3 - 11

Now proceed from left to right to get the final answer of:

-14.7

Hope this helps!

dmitriy555 [2]3 years ago

3 0

Basically, you want to plug in these values into the equation.

(4)-(9)+(11/9)-11

Simplify it

-5+11/9- 11

-16+11/9

=16 11/9

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Find lim x→3 sqrt 2x+3-sqrt 3x/ x^2-3x. you must show your work or explain your work in words plsss I need help

sineoko [7]

I'm assuming the limit is supposed to be

$\displaystyle\lim_{x\to3}\frac{\sqrt{2x+3}-\sqrt{3x}}{x^2-3x}$

Multiply the numerator by its conjugate, and do the same with the denominator:

$\left(\sqrt{2x+3}-\sqrt{3x}\right)\left(\sqrt{2x+3}+\sqrt{3x}\right)=\left(\sqrt{2x+3}\right)^2-\left(\sqrt{3x}\right)^2=-(x-3)$

so that in the limit, we have

$\displaystyle\lim_{x\to3}\frac{-(x-3)}{(x^2-3x)\left(\sqrt{2x+3}+\sqrt{3x}\right)}$

Factorize the first term in the denominator as

$x^2-3x=x(x-3)$

The $x-3$ terms cancel, leaving you with

$\displaystyle\lim_{x\to3}\frac{-1}{x\left(\sqrt{2x+3}+\sqrt{3x}\right)}$

and the limand is continuous at $x=3$ , so we can substitute it to find the limit has a value of -1/18.

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3 years ago

Warren is on vacation and needs to arrange transportation. A rental car costs 60 dollars per day plus a one-time cost of 14 doll

Vlad1618 [11]

Answer:

The answer is C(x) = 60x + 14 and the answer to the second one is 7 days.

Step-by-step explanation:

C(x) =60x + 14

434 = 60x + 14

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420 = 60x

/60 /60

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x = 7 days

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Answer:

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