81 : (__: 4) = 9 evaluate the numeric expression

Which of the following systems of linear equations has an infinite number of solutions?

Given the speeds of each runner below, determine who runs the fastest. Katie runs 14 feet per second. Zach runs 576 feet in 46 seconds. Tony runs 1 mile in 533 seconds. Will runs 827 feet in 1 minute.

The number of books in kara's collection is divisible by 2,4,5 and 10 she has more that 11 books and fewer than 25 books. how many books does she have

Maria lives two and three fourths from her after school job. She rode her scooter from school to her job and back home. How far did Maria ride?

A spinner has ten equal sectors labeled from 1 to 10. The spinner is spun once. What is the probability of getting an odd number and a number greater than 4?

How many different ways can you find of writing 1/2

I DON'T GET IT! >.< Which number can each term of the equation be multiplied by to eliminate the decimals before solving? 5.6j - 0.12 = 4 + 1.1j a. 0.01 b. 0.1 c. 10 d. 100

Solve this number riddle I am an a odd number. I am less than 100. The sum of digits is 12. I am a multiple of 15. What number am I?

Is this an expression or an equation? Three times a number plus five equals twenty

14.36 rounded to the nearest tenth