(a) find the function’s domain, (b) find the function’s range,
(c) describe the function’s level curves,
(d) find the boundary of the function’s domain,
(e) determine if the domain is an open region, a closed region, or neither, and
(f) decide if the domain is bounded or unbounded.
f(x, y)=4x2+9y2

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.

don't report but were is the digram

step-by-step explanation: