All categories

3 years ago

For what value of x would the expression below be undefined 5x-18/x-7

Mathematics

2 answers:

snow_lady [41]3 years ago

8 0

Answer:

D. 7

Step-by-step explanation:

The given expression is

$\frac{5x-18}{x-7}$

This is a rational expression.

This expression undefined, when the denominator is zero.

We equate the denominator to zero to get;

$x-7=0$

This implies that;

x=7

Troyanec [42]3 years ago

6 0

Answer:

The correct answer option is 7.

Step-by-step explanation:

We are given the following expression and we are to determine whether which of the given options for the value of x would the expression become undefined:

$\frac { 5 x - 1 8 } { x - 7 }$

We know that the expression is undefined when the denominator equals zero. So to make the denominator zero, the value of x should be 7.

You might be interested in

Please Help Me

ludmilkaskok [199]

Given:

The point (9,-12) is on terminal side of angle theta in standard position.

To find:

The exact value of each of the six trigonometric functions of theta.

Solution:

The given point is (9,-12). Here, x-coordinate is positive and y-coordinate is negative. So, the point lies in 4th quadrant and only cos and sec are positive in 4th quadrant.

We know that,

$r=\sqrt{x^2+y^2}$

$r=\sqrt{9^2+(-12)^2}$

$r=\sqrt{81+144}$

$r=\sqrt{225}$

$r=15$

Now,

$\sin \theta=\dfrac{y}{r}=\dfrac{-12}{15}=-\dfrac{4}{5}$

$\cos \theta=\dfrac{x}{r}=\dfrac{9}{15}=\dfrac{3}{5}$

$\tan \theta=\dfrac{y}{x}=\dfrac{-12}{9}=-\dfrac{4}{3}$

$\cot \theta=\dfrac{1}{\tan \theta}=-\dfrac{3}{4}$

$\text{cosec} \theta=\dfrac{1}{\sin \theta}=-\dfrac{5}{4}$

$\sec \theta=\dfrac{1}{\cos \theta}=\dfrac{5}{3}$

Therefore, the values of six trigonometric functions of theta are $\sin \theta=-\dfrac{4}{5},\cos \theta=\dfrac{3}{5},\tan \theta=-\dfrac{4}{3},\cot \theta=-\dfrac{3}{4},\text{cosec} \theta=-\dfrac{5}{4},\sec \theta=\dfrac{5}{3}$ .

6 0

4 years ago

2x - y = 11 6x – 3y = 15 solve for x and y using elimination

Yanka [14]

Answer:

Step-by-step explanation:

Given the simultaneous equation

2x - y = 11. Equation 1

6x – 3y = 15. Equation 2

Using elimination method

Multiply the coefficient of x in equation 1 (which is 2) to equation 2. Also, multiply the coefficient of x in equation 2 (which 6) to equation 1. By doing this we are going to eliminate x

2x - y = 11. × 6 Equation 1

6x – 3y = 15. ×2 Equation 2

12x-6y=66. Equation 3

12x-6y=30. Equation 4

Subtract equation 4 from 3

Then (12x-6y) - (12x-6y) =66 -30

0=36

Which is not possible

Then the system has no solution, it has no solution at all. Because 0 is not equal to 36. If has been 0 equals to 0, then we may many solutions for simultaneous equation.

8 0

3 years ago

What is 48,345÷34,886

arlik [135]

Answer: 1,38

Step-by-step explanation: Because 48,345 ÷ 34,886 = 1,385799461101875, so I rounded off to 1,38

6 0

3 years ago

Write an inequality to fit the given inequality the line pass through (0,1) and (1,3)

borishaifa [10]

Answer: Y< 2/1x +1

Step-by-step explanation: (Slash mark means a fraction)

3 0

3 years ago

The length of a room is 6.15 feet longer than the width, x

konstantin123 [22]

Do you still need help????????????

5 0

3 years ago