What does the curvy (i) mean in a math equation?

What number must I add to complete the square? x^2+14x=-5

Vince had c CDs until he won 21 more in a contest. Write an expression that shows how many CDs Vince has now. Type an asterisk (*) if you want to use a multiplication sign and a slash (/) if you want to use a division sign.

You ask 125 randomly chosen students to name their favorite food. There are 1500 students in the school. Predict the number of students in the school whose favorite food is pizza.

In a race that consisted of three parts, the cycling part was 12 1/2 miles long. The running part of the race was 1/4 the distamce pf the cycling part. The kayaking part of the race was 1/2 the distance of the running part.

Simplify (x^2+5x+5) - (2x^2+6)

An employer may conduct an aptitude test to check for what? A. Your ability to solve problems B. Test your actual skills, such as typing C. Discover individual behavior patterns D. The capacity to acquire certain skills

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Three times a number is greater than six.

Mike's Movie Rentals charges $3.00 for each rental plus $0.50 for each additional day. Reed's Rentals charges $1.50 for each rental plus $1.25 for each additional day. For what number of additional days will the bill at both stores be the same?

What does 7 minus the product of 2 and x in algebra?