1: distance: 238 miles time: 5 hours, 24 minutes, find the average speed. 2: distance: 446 miles time: 17 hours, 48 minutes, find average speed. 3: distance: 387 miles time: 12 hours, 54 minutes, find average speed.

Step-by-step explanation:

speed = distance / time

1. (238 mi)/(5.6 h) = 42.5 mph

2. (446 mi)/(17.8 h) = 25.0561... mph . . . (a very long repeating decimal)

3. (387 mi)/(12.9 h) = 30 mph

the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

the root or roots of a polynomial are the values of the variable that makes the polynomial equal to 0. we can find the roots of a polynomial making the expression equal to 0 and then, isolating the variable (it it has just one variable).

for example, given the following polynomial:

the root or zero of the polynomial, can be found by making the expression equal to 0, and then, isolating the variable, so, finding the root we have:

therefore, we have that the root of the polynomial is equal to 2.

we must remember that the number of roots that a polynomial can have, will depend on the degree of the polynomial, a first degree polynomial have will have one single root, a second degree polynomial (quadratic expression) may have two roots and so.

hence the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

have a nice day!

h * s * a

h = history teacher

s = science teacher

a =   art teacher.

i see no data table, but just multiply the number of history teachers, science teachers, and art teachers.