What does a semicolon in math mean

The sum of twenty and a number is 14.

A number a minus 8.2 is no greater than 12.

A quadrilateral has two consecutive right angles. If the quadrilateral is not a rectangle, can it still be a parallelogram? Explain your reasoning.

How do you do multiplying

Solve, using linear combination. 3x + y = 4 2x + y = 4 A. (-1,7) B. (0,4) C. (-3,12) D. (-3,13)

How do you solve 7-5z=17+5z

Ms. Bloom spent 1 5/12 hours in preparing for her class and spent 2 1/12 hours teaching the class. Later that day, she spent 1 11/12 hours cleaning her work desk at home. How much time did she spend on working this day.?

Paula dives into a swimming pool from a diving board 2 feet above the water's surface. She descends to a depth 7 feet below the diving board. How far is Paula from the surface of the water?

Dan runs 3 miles in 28 minutes. At the same rate, how many miles would he run in 42 minutes?

Jonah and Lizzy are making smoothies that have the same number of fluid ounces. Jonah smoothing contains 6 ounces of juice and 4 containers of yogurt. Whole Lizzy's smoothie contains 12 ounces of juice and 2.5 containers of yogurt.