Adrian could only finish \large \frac{7}{8} of his math test before time ran out. The test had 32 questions. How many questions did Adrian answer before time ran out?

9514 1404 393

  28

Step-by-step explanation:

Adrian answered 7/8 of 32 questions, so the number he finished is ...

  (7/8) × 32 = (7×32)/8 = 7×(32/8) = 7×4 = 28

Adrian answered 28 questions.

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb