Which of the following statements is always true for all values of a

A) - a = a

B) |a| = - a

C) |a| = a

D) - (-a) = a

Find the discriminant: * 7x2 - 5 = 2x + 9x2

A grocer buys food from three suppliers. the suppliers deliver every five days, six days, and seven days. all three came today. in how many days will they all deliver on the same day again?

Which action invalidates the contract Kyle signed?

Taylor wants to figure out how much interest she will earn if she keeps $500 in her savings account for 2 years at a simple annual interest rate of 3%.

What is the approximate circumference of a circular saw blade with a radius of 10.4 inches? (use? = 3.14 a. 16.328 inches b. 65.312 inches c. 32.656 inches d. 97.968 inches?

Evaluate 7 raised to power 4 multiplied by 4 divided by 7 raised to power 2 multiplied by 2

Anton has 4 pennies, 1 dime, and 2 dollar bills. He buys a granola bar for $0.89. How much money does he have left? ones, tenths, hundredths

An expression is written as m-5 (m+3) + 7m. What is the value of the expression when m=x+1?

Cormac is making 29 phone calls each week as part of a fundraiser. Last week, he made 10 phone calls on weekdays. Which equation could be used to find x, the number of phone calls he made last week on weekend days?

Jasmin's dog weighs 58 pounds. Her vet told her that a healthy weight for her dog would be less than or equal to 40 pounds. Jasmin's dog can lose an average of 1.5 pounds every week.