Estimate the answer of -6 3/5 - (-7 4/15) +2 1/5

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

In the diagram below,abc is congruent to dec what is the value of x