16. Determine if the following statements are always, sometimes, or never true.

a. When adding two negative rational numbers, the sum will be negative.

b. When adding two rational numbers with different signs, the sum will
be zero.

C. When adding two positive rational numbers, the sum will be zero.

d. When adding two rational numbers with different signs, the sum will
be negative.

Someone pllzz help

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

What is the fewest number of full weeks briyana would have to work to have enough money? 8 weeks9 weeks 10 weeks11 weeks

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.