Consider the expression − + 3 10 x . a. As x − values increase, does the value of the expression increase, decrease, stay the
same, or is it impossible to tell? Explain.
b. When the value of x changes by a total of −5 units, by how much does the value of
the expression − + 3 10 x change? Explain.

x

3

−

2

x

2

−

8

x

x

2

−

4

x

=

x

+

2

, but  

x

cannot take values  

x

=

0

and  

x

=

4

Explanation:

x

3

−

2

x

2

−

8

x

x

2

−

4

x

=  

x

(

x

2

−

2

x

−

8

)

x

(

x

−

4

)

=  

x

(

x

2

−

4

x

+

2

x

−

8

)

x

(

x

−

4

)

=  

x

(

x

(

x

−

4

)

+

2

(

x

−

4

)

)

x

(

x

−

4

)

=  

x

(

x

−

4

)

(

x

+

2

)

x

(

x

−

4

)

=  

x

(

x

−

4

)

(

x

+

2

)

1

x

(

x

−

4

)

=  

x

+

2

but  

x

cannot take values  

x

=

0

and  

x

=

4

as that makes the denominator  

x

2

−

4

x

=

0

.

Step-by-step explanation:

pleasee mark brainliest

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,