On serena's tenth birthday, her mom was 3 times serena's age. how old will serena and her mom be when here mom's age times 0.5 will equal serena's age? (i think there is a typo in my book. if so, i think this is the question they meant to ask/type. how old will serena and her mom be when serena's ages times 0.5 equals her mom's age? basically, a x 0.5 = b)

Question 101 points)which equation in slope-intercept form represents the line that passes through (5, 1) and(-4,7)

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer