Which function has a restricted domain?

Hello!

We can look at each answer choice to verify whether it has a restricted domain or not:

A.  

This is a function similar to a cubic root function. Its domain is (-∞, ∞), so it has no restriction.

B.  

This is a square root function. This graph only consists of x-values in the interval (3, ∞) because you cannot take the square root of a negative number. This function has a restricted domain.

C.

This is a cubic function, so it has an interval of (-∞, ∞)

D.  

This is a quadratic function, which has no domain restriction.

Therefore, the correct answer is B.

answer: was that a question or answer?

step-by-step explanation:

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!