You owe some friends $25 and pay them back $18. Which number sentence shows this situation?

25 + 18

-25 + 18

-18 + 25

-25 + (-18)

how many significant figures does this number contain 0.0072

Use algebra, What number exceeds y by 4 less than x?

Consider the equations y = |x - 1| and y = 3x + 2. The approximate solution of this system of equations is?

How many 3/4 are there in 5 1/4

Calculate the percent error if the experimental value of the density of copper is 21.2 g/cm3 and the accepted value is 22.1 g/cm3.

At 7:30 a. m., a bus left Town P for Town Q at a speed of 60 kilometers per hour. 15 minutes later, a car left Town Q and headed for Town P. The car reached Town P at 10:45 a. m. The bus reached Town Q at noon.

The fundamental theorem of Arithmetic The system (E) : The set of all even positive integers The system (T) : all positive integers congruent to 1 mod 3 1. List the primes in E between 1 and 20. 2. List the primes in E between 21 and 40. 3.

Suppose you are getting new inground pool at your house. The pool is going to be a rectangle that is 30 feet by 15 feet. The outside border of the deck around the pool will also be a rectangle, which is 44 feet by 28 feet.

There are 12 team members. They each ate 3 slices of pizza. Each pizza was cut into 8 slices. What fraction of the pizza did the team eat altogether?

Solve for v 12v = 18+6v