Which element would be most appropriate for a speech before a formal audience?
a. humorous stories about the speaker
b. quotes from a well-respected author
c. visual aids, such as cartoons
d. occasional use of slang words
it's not a

B. Quotes from a well-respected author

Explanation: an audience is a group of spectators at a public event; listeners or viewers collectively, as in attendance at a theater, speech, or concert. Before a formal audience, we should prepare a formal speech, which should be very correct and serious rather than relaxed and friendly, and usually doesn't have visual aids. From the given options, the only one that would be appropriate for a speech before a formal audience is to include quotes from a well-respected author.

the number of people with jobs in factories as unskilled workers increased.

in the problem you wrote said that the taxi charges $0.070 per mile(which would be 7 cents per mile), but then in your suggested equation you have it as $0.70 per mile (which is 70 cents per mile).

the latter seems more realistic, so i will assume that the taxi costs $5.00 and charges $0.70 per mile with tolls costing an additional $3.50. and it asks you to find how far you can travel on $36.50.

let x the number of miles traveled. since the taxi charges $0.70 per mile, multiplying this by the miles traveled (x) will yield the cost of the taxi ride as far as how far it took you. then adding this amount to the cost of the taxi ($5.00) and the additional cost for the tolls ($3.50) will give you the total cost of the taxi ride ($36.50)

that is,

            (0.70)x + 5.00 + 3.50 = 36.50

adding the like terms on the left-hand side of this equation, we arrive at the following:

            (0.70)x + 8.50 = 36.50

subtracting 8.50 from both sides of the equation, we get:

            (0.70)x = 28.00

to solve for x, divide both sides of the equation above by the coefficient of x (that being, 0.70):

            x = 40

thus, you can travel up to 40 miles on $36.50