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sergij07 [2.7K]
2 years ago
7

Which of the following of x makes the rational expressions below undefined

Mathematics
1 answer:
alisha [4.7K]2 years ago
5 0

A rational expression is undefined if the denominator is zero. Since the denominator is x+13, the expression is undefined if

x+13 = 0 \iff x=-13

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Please help me with this question!!!!!
Naddika [18.5K]

Answer:

7/25

Step-by-step explanation:

θ lies in quadrant ii

so 2θ lies in quadrant iv

csc θ=5/3

sin θ=3/5 (sin θ=1/csc θ)

[cos(α+β)=cosαcosβ-sinαsinβ]

cos (2θ)=cos(θ+θ)=cos θ cos θ-sin θ sin θ=cos² θ-sin ²θ=1-sin²θ-sin²θ=1-2sin²θ

=1-2 (3/5)²

=1-2(9/25)

=1-18/25

=(25-18)/25

=7/25

5 0
3 years ago
Solve 3/2 x 10/3. Simplify if possible.
olga2289 [7]
Ok, for multiplication of fractions you do not need a common denominator so multiply top by top and bottom by bottom... let me know what you get 
6 0
3 years ago
A quantity, y, varies directly as x When y=10, x=6.<br> Find xwhen y= 14.
grigory [225]

The value of x when y = 14 is 8.4

<h3 />

<h3>How to solve variation ?</h3>

y, varies directly as x. Therefore,

y ∝ x

Therefore,

y = kx

where

  • k =constant of proportionality

Therefore,

10 = 6k

k = 10 / 6

k = 5 / 3

Hence, when y = 14

y = kx

14 = 5 / 3 x

cross multiply

42 = 5x

x = 42 / 5

x = 8.4

learn more on variation here: brainly.com/question/20707320

#SPJ1

7 0
2 years ago
Sam needs enough wallpaper to cover an area that was 900 square inches . How many inches long of the wallpaper to the roll does
tigry1 [53]
Sam will need 30 rolls of 30 inches of paper
4 0
3 years ago
Now, suppose one of the roots of the polynomial function is complex. The roots of the function are 2 + i, and 5. Write the equat
rjkz [21]
The other commentor is right. The correct answer is 2-i
The second follow-up question is the second option
f(x) = (x<span> – (2 + </span>i))(x<span> – (2 –</span><span> i</span>))(x<span> – 5)
</span>The third follow-up question has these three answers. 
9x^2
25x
25
5 0
3 years ago
Read 2 more answers
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