Question

A math teacher has a total of 88 books which consist of algebra 2 books and geometry books. She has 4 more geometry books than algebra 2 books. How many geometry books does she have?

Mary wants to mail a box which has dimensions (5x-5) inches long, (3x+2) inches high and (2x) inches wide. Express the volume as a polynomial.

If $2,000 is invested in an account at an interest rate of 6% compounded continuously, in about how many years will the money be worth $3200?


Please help!

Answer 1

let x be alg 2 books
then geo books =x+4
so x+4+x=88
find x
x is alg 2
so geo=x+4

Answer 2

=P*(1+r/100)^x=A
where p is principal
r is interest
x is no of years
A is total amount at the end of investment