Look at the following expression. Are there any values of x for which the expression is not defined under the set of real numbers? Explain your reasoning. (2 points)

The expression is not defined at x= -2 & for all values of x  less than -2 .

Step-by-step explanation:

We have , a given expression as : Basically we need to find domain for this function and see for which values of x the above function is undefined . Domain of a function is the set of values of x for which the function is defined . We have a rational expression,  it's a fractional function which means denominator can be 0 . Denominator =

⇒

⇒

⇒

So , . Also , Denominator is a square root expression so it can't be negative inside root ∴ ⇒ i.e. x must be greater than -2.

Therefore, the expression is not defined at x= -2 & for all values of x  less than -2 .

-10i^2-4i

step-by-step explanation:

evaluate for p=2,q=5i

(2−4)(2+5i)i

(2−4)(2+5i)i

=−10i2−4i

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.