Why is p logically equivalent to "not" "not-p"

Henri's bill at a restaurant is $19.62. He wants to leave a tip of 20%, or, of the bill. To find the exact amount of the tip, he should multiply the bill by

Frank Friedman writes a $45 check, but his account has only $20 in it. He must also pay Central City Power and Water charges $25 for returned checks. Which of the following represents the amount Frank must have to balance his debts.

Solving Exponential and Logarithmic Equation In exercise, solve for x or t. See example 5 and 6. In 2x = 2.4

What is 7392 divided by 6

How do you do mixed fractions

Five less than nine times a number is the same as nineteen more than the number

How do I complete this factor? 16x^2-18=

Which Equation represents this problem? Pauline can spend $36 on bus fare each week. She needs to ride the bus 5 days a week. How much can she spend each day on bus fare? A. 36 + b = 5 B. 5 x b = 36 C. 5 : b = 36 D. 36 - b = 5

Suppose that your mom gives you $20 to go to the school supplies store. there is a 6% sales tax on supplies. you need to buy the following items:pencils = $1.29notebook binder = $5.99paper = $3.49high-lighter pens = $2.35a.

Francesca is buying a sterreo system for $196. She wants to pay for it in four equal monthly installments. What is the amount she will pay each mounth?