Step-by-step explanation:
x^2 = 16
x = ±4
x^2 = -16
x = -
as a negative number cannot be squareroot
Answer:
17%
Step-by-step explanation:
To calculate percent increase use
percent increase =
× 100%
increase = 28 - 24 = 4, hence
percent increase =
× 100% = 17% ( nearest percent )
Answer: 52 books
Step-by-step explanation: it's reverse math. Subtract the books that she bought from the amount she has now and then multiply by 2 (39-13=26•2=52)
105 hope that helps and always have a great day!