If I had 30 students in a class and the average age was 20.9 and I added twins and the average age changes to 21.6 years old, how old are the twins?

How do I simplify √2+√5 / √2-√5

If you know the rate of a water leak in gallons per hour, how can you find the number of hours it takes for 1 gallon to leak out? Justifyyour answer

What is the relationship between the ratios? 8/11 and 24/33 Drag and drop to complete the statement. · The ratios are A. proportional B. not proportional

Amanda's computer weighs 56 ounces. how many pounds does it weigh?

Which of these is true of liquid matter? A. The atoms or molecules in a liquid do not touch. B. The atoms or molecules in a liquid do not vibrate. C. The atoms or molecules in a liquid are closely packed. D. all of the above

If your born on 1900 how old would have you been on 2009?

How many triangles exist with the given angle measures 55,45,90 degrees A. Exactly one unique triangle exists with the given angle measures. B. No triangle exists with the given angle measures. C.

What's 67890 + 5336882

What are the zeroes of f (x) = (x-1) (x+1) ?

Along thid river at wich two aproximate altitude ranges are tge gradients the steepest