Write in the blank the form of the verb in parentheses that agrees with the subject.

This is one of the reasons many persons _____ travel agencies. (use)

Consider the function $f(x, y)=x y+x+y+100$ subject to the constraint $x y=4$. Solve the system in part (a) to verify that $(x, y)=(-2,-2)$ and $(x, y)=(2,2)$ are solutions.

Underline the subject and the correct word or word group in parentheses in each of the following sentences.

Where (is, are) the other assignments for the class?

Maximize

$$z=f_1(x)=7x_1+14x_2$$

subject to

$$0≤x_≤6, 0≤x_2≤3, 7x_1+14x_2≤84.$$

For the following sentence, underline the correct form of the verb in parentheses. Then, underline the subject of the sentence twice.

There (is, are) the list of items you wanted.

Use Theorem 1 to explain why no maxima or minima exist. Minimize $f(x, y)=4 y-3 x$, subject to 2x+5y=3.

Circle each subject and underline each verb in the following sentences.

Christina played the guitar and sang songs from Chile.

Find the minimum and maximum values of the function subject to the given constraint.

$$f ( x , y ) = 4 x ^ { 2 } + 9 y ^ { 2 },$$

xy = 4

Underline the form of the verb that agrees with the subject.
Anyone who (excavates, excavate) a dinosaur has many stories to tell.

Place a check next to each sentence in which the subject and verb agree. _____ Some people criticizes the use of factory farms.

Write $U$ beside each sentence that has you as its understood subject. Write $I$ beside each sentence that is in inverted order. If the sentence is in inverted order, draw one line under the subject and two lines under each simple predicate.

There lived a man in an old cottage out on the headland.

Which subject does this sentence describe? Aprendemos de nuestro país y los países del mundo. (yo) (nosotros)

Draw two lines under the verb in parentheses that agrees with the subject.

Three games (remains, remain) a complete set.

Draw two lines under the verb in parentheses that agrees with the subject.

Three hours (was, were) devoted to practicing piano.