Question

1. $\frac{c}{d}-15$ 23. $2(d - 5)$ for problems 24–27, evaluate each expression when $a = 4$ and $b = 5$. show your work 24. $\frac{ab}{2}$ 25. $\frac{a^{2}}{8}$

Explanation:

Problem 24:

Step1: Substitute \(a = 4\) and \(b = 5\) into \(\frac{ab}{2}\)

\(\frac{4\times5}{2}\)

Step2: Calculate numerator first

\(4\times5 = 20\), so we have \(\frac{20}{2}\)

Step3: Divide 20 by 2

\(\frac{20}{2}=10\)

Step1: Substitute \(a = 4\) into \(\frac{a^{2}}{8}\)

\(\frac{4^{2}}{8}\)

Step2: Calculate \(4^{2}\)

\(4^{2}=16\), so we have \(\frac{16}{8}\)

Step3: Divide 16 by 8

\(\frac{16}{8} = 2\)

Answer:

10

Problem 25: