1)when adding two negative numbers, the absolute value of the numbers and keep the negative sign.
add
subtract
change
2)when adding two different signed numbers, the absolute values of the numbers and keep the sign of the number with the larger absolute value.
add
subtract
change
3)when subtracting, change the subtraction to addition and the sign of the number being taken away
add
subtract
change
4)which of the following would be a good estimate for -7.94 - 2.31?
-9
-5
-6
-10

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

Evaluate 3(a + b + c)squared for a = 2, b = 3, and c = 4. a. 54 b. 243 c.729 add solution .

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297