Explain why each statement is true. 1. 5+2+3=5+(2+3)
2. 9a is equivalent to 11a-2a
3. 7a + 04 - 2a is equivalent to 7a + -2a + 4
4. 8a-(8a-8) is equivalent to 8

Aformual for 8 bottles of window cleaner calls for 6 cups of rubbing to customers alcohol 2 1/4 gallons of water and 1 1/2 cups of ammonia alcohol would the forula call if a factory made 1,280 bottles for stores to sell to customers

Is the square root of 4 plus the square root of 16 rational?

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.