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3 years ago

50 points!

Mathematics

2 answers:

Thepotemich [5.8K]3 years ago

5 0

Answer:

Step-by-step explanation:

An excluded value is any value of x that makes the denominator of the rational expression zero as this would make the expression undefined.

Consider expression D

$\frac{6}{x+5}$

This will be undefined when

x + 5 = 0 ⇒ x = - 5 ← excluded value → D

bulgar [2K]3 years ago

5 0

Answer:

D) 6/x+5

Hope this helps :)

Have a great day !

5INGH

Step-by-step explanation:

In this example, we will use D

x + 5 = 0 ⇒ x = - 5 ( Excluded value )

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How do you do this? Because I don’t get it

olganol [36]

Multiply by -1 each time to get the answer in the output

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2 years ago

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If two 6-sided dice are rolled, what is the<br> probability of rolling double 2s?

Komok [63]

16.7%

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3 years ago

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Two pipes can fill a tank in 19 minutes if both are turned on. If only one is used, it would take 49 minutes longer for the smal

a_sh-v [17]

Answer:

The time taken by smaller pipe to fill the tank alone is 74.2 min

Step-by-step explanation:

Given as :

The time taken by two pipes to fill tank = 19 min

Let the time taken by larger pipe to fill tank = y

And the time taken by smaller pipe to fill tank = x

According to question

The smaller pipe takes 49 minutes longer than larger pipe

I.e x = y + 49

Now,

$\dfrac{1}{x}$ + $\dfrac{1}{y}$ = $\dfrac{1}{49}$

Or, $\dfrac{1}{y + 49}$ + $\dfrac{1}{y}$ = $\dfrac{1}{49}$

Or, $\dfrac{y + 49 + y}{y^{2} + 49 y }$ = $\dfrac{1}{49}$

Or, 2 y + 49 = $\dfrac{y^{2}+49y }{19}$

Or, 19 × ( 2 y + 49 ) = y² + 49 y

Or, 38 y + 931 = y² + 49 y

Or, y² + 49 y - 38 y - 931 = 0

or, y² + 11 y - 931 = 0

Or, Applying quadratic equation method to calculate the value of y

so, y = $\frac{- b \pm \sqrt{b^{2}-4\times a\times c}}{2\times a}$

Or, y = $\frac{- 11 \pm \sqrt{11^{2}-4\times 1\times (-931)}}{2\times 1}$

Or, y = $\frac{- 1 \pm \sqrt{121+3724}}{2}$

or, y = $\frac{- 1 \pm \sqrt{3845}}{2}$

or, y = $\frac{- 1 \pm 62.008}{2}$

∴ y = 25.2 , - 36.5

So, The time taken by larger pipe = y = 25.2 min

and the time taken by smaller pipe to fill the tank = y + 49 = 25.2 + 49 = 74.2 min

Hence The time taken by smaller pipe to fill the tank alone is 74.2 min answer

6 0

3 years ago

Solve for the missing piece. Round answer to the nearest tenth when necessary.

galina1969 [7]

Answer:

21.0

Step-by-step explanation:

SOHCAHTOA

In this case you would be using TOA

tan (x) = opposite/ adjacent

tan (51) = x / 17

x = 17 tan (51)

x = 20.9932

x= 21.0

4 0

3 years ago

BRAINLY FOR CORRECT ANSWER FOR ALL THREE MATH QUESTIONS <3 thank you <3

MA_775_DIABLO [31]

Question 1

A

Question 2

D

Question 3

A

Hope this helps i hope you get a 100

8 0

3 years ago