Nancy found that x=1 is one solution to the quadratic equation (x+2)2=a. What is the value of a? -9 -3 3 9

Anewborn baby had about 26,000,000,000 cells. an adult has about 4.94 times 10 to the 13 power cells. how many times as many cells does an adult have than a newborn

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

When you answer this can you explain