17 would be the answer, you divide 30 by 1.75 and you get 17.14 but you can’t buy .14th of a book so you’re left with 17
A^2-8a-48=0
factor
(a+4)(a-12)=0
set each equal to 0
a+4=0 a-12=0
a=-4,12

An expression having five terms which is equivalent to above term is :
Answer:
The correct answer is:
<em><u>D.</u></em><em><u> </u></em><em><u>4</u></em><em><u> </u></em><em><u>√</u></em><em><u>a</u></em><em><u>²</u></em><em><u> </u></em><em><u>+</u></em><em><u> </u></em><em><u>b</u></em><em><u>²</u></em>