r + 0.12 = 0.20 what number is r

There are 2504 computer science students at a school. Of these, 1876 have taken a course in Java, 999 have taken a course in Linux, and 345 have taken a course in C.

Which of the following is true because of the Commutative Law of Addition? 2 + 11 + 16 = 11 + 16 + 2 2 + 11 + 16 = 20 + 9 2 + 11 + 16 = 29 2 + 11 + 16 = 2 + 11 + 16

The two-way frequency table represents data from a survey asking mall visitors whether they like seafood, meat, or both. Which is the joint relative frequency for mall visitors who like seafood and meat?

A six-sided die is labeled with numbers from 1-6. If a student rolls the cube 150 times, how many times should they expect to roll an even number?

Fiona's school has three hallways that make up three sides of a triangular building design. In the morning, Fiona walks 90 yards through the first hallway to get to the next.

Which expressions are equivalent to 3 (62) ? Select each correct answer. 3 (60 + 2) 3 (6 + 2) 3 (6 + 56) 3 (60 + 20)

George took his friends to a movie. He bought 3 movie tickets that cost x dollars each, and one jumbo chicken sandwhich. The cost 15 dollars less than one movie ticket. which expression represents this situation?

Equation. 5x+9=2, 7-6d=3, 1/3y-2=4,

Leo's townhouse has a market value of $310,000. The property in Leo's area is assessed at 40% of the market value. The tax rate is $145.10 per $1,000 of assessed valuation. The tax for Leo is

Which is the value of the digit 8 in Alaska population?