Is |a+b|=|a|+|b| for all rational numbers a and b? Explain.

What is the percent of 0.19

What is the place value of the 9 in 89,170,326

42,589 rounded to the nearest ten-thousand is

Is the sequence geometric? if so, identify the common ratio 3, 12, 48, 192

A researcher claims that the average age of a woman before she has her first child is greater than the 1990 mean age of 26.4 years, on the basis of data from National Vital Statistics Report, Vol. 48, No. 14.

The temperature is changing every day by negative 7 over 18 degrees Fahrenheit. What will be the change in the temperature after 3 days?

The equation of the polynomial function is: f (x) = (x + (2 + i)) (x + (2 - i)) (x + 5) f (x) = (x - (2 + i)) (x - (2 - i)) (x - 5) f (x) = (x - (2 + i)) (x - (2 - i)) f (x) = (x + (2 + i)) (x - (2 - i)) (x - 5)

Andre owned a 1/4 acre lot. He wanted to construct a 120' x 80' tennis court on the lot. How many square feet will remain uncovered after he builds the tennis court?

Mary is paid 7.5% commission on all of her sales. She had sales of $2300 for the month of December. How much commission did Mary make?

What is the total weight in pounds of a 2.5 million blocks used to build the great pyramid and then convert that to ounces