Which method is better for solving the following equation?

4x2+7x - 8 = 0

Yesterday, Bethany sent 60 text messages. She said that 15% of those messages were to her best friend. How many texts messages did Bethany send to her friend yesterday?

A long distance phone call between two cities costs $3.43 for 7 minutes. What is the rate in cents per minute?

If there is more then more solution, separate them with commas.) (2x + 9) (3-z) = 0

Cint has 30 comedy movies on dvd and 25 mystery movies on dvd. he puts 9 dvds on each shelf. what is the minimum of shelfs needed to hold the dvds?

The total number of shares of stock in a corporation is 950,000. Carlos owns 25,000 shares. What percent of the shares of stock does he own?

The rate at which a planet receives heat from a hot sphere such as sun varies directly with the fourth power of the sun's absolute tempature, directly with the surface area of the Sun, and inversely with the square of the distance from the Sun to

Write the algebraic expression for the quotient of 79 and x

Which expression is equivalent to 647 times 39.

2x divided by x+5 less than or equal to 0

Dan read 104 pages of his book. He has 68% left. How many pages in his book?