Name _____________________________________________ Date _____________________________ Int. Algebra II – 1.5 Rewriting Equations and Formulas
Solve the formula for the indicated variable
1. Distance Formula D  rt for t ____________
2. Interest Formula I  P r t for t
____________
4. Volume Formula V  lwh for h _____________
For 19-21, use the formula for simple interest:
3. Energy Formula E  mc 2 for m ___________ ࡵ ൌ ࡼ࢚࢘
5. Solve the formula for the rate r. ________________ ଵ
6. After one quarter ( year), the interest on a principal of $1000 is $8.75. ସ
Find the rate. Write your answer as a percent. Rate:_______________ Percent:_____________ 7. You deposit $1000 in an account that earns interst at a rate of 3.5%. After one full year, how much interest will you earn? How much money will be in the account? Interest:_______________ Money:_____________ Find the value of y for the given value of x by substituting for x, then solving for y.
8. 3 x  8 y  3; x  2 ______________
9.
1
2
x   y  10; x  12 ______________ 2
3
Find the value of y for the given value of x by solving for y then substituting x.
10. x  y  8; x  5 ____________
11. 4 x  2 y  18; x  8 ____________ Solve the formula for the indicated variable. Then evaluate the rewritten formula for the
given values. Use 3.14 for π.
1
12. Area: A  bh
2
1
13. Volume: V   r 2 h 3
Solve for b. ______________ Solve for h. _______________ Find the value of b when Find the value of h when A = 160 and h = 20. V = 84 and r = 4 _________________ ________________