91Ó°ÊÓ

Use the distributive law to factor each of the following. Check by multiplying. $$ 25 y+30 $$

For Exercises \(75-80,\) consider the following list: $$\begin{array}{llll} {18,} & {-4.7,} & {0,} & {-\frac{5}{9},} & {\pi,} & {\sqrt{17}, \quad 2, \overline{16},} & {-37} \end{array}$$ List all natural numbers.

Evaluate. $$ (-x)^{2}-5 x, \text { for } x=-3 $$

Combine like terms. \(6 m+9 n+(-9 n)+(-10 m)\)

Perform the indicated operation and, if possible, simplify. If there are no variables, check using a calculator. $$ 12 \div \frac{3}{7} $$

Evaluate. $$ \frac{3 a-4 a^{2}}{a^{2}-20}, \text { for } a=5 $$

For Exercises \(75-80,\) consider the following list: $$\begin{array}{llll} {18,} & {-4.7,} & {0,} & {-\frac{5}{9},} & {\pi,} & {\sqrt{17}, \quad 2, \overline{16},} & {-37} \end{array}$$ List all integers.

Use the distributive law to factor each of the following. Check by multiplying. $$ 3 a+9 b $$

In each of Exercises \(71-78,\) match the phrase or sentence with the appropriate expression or equation from the column on the right. One less than the product of two numbers is 49_____ a) \(\frac{x}{y}+6\) b) \(2(x+y)=48\) c) \(\frac{1}{2} \cdot a \cdot b\) d) \(t+2=5\) e) \(a b-1=49\) f) \(2(m+n)\) g) \(3(t+5)\) h) \(x-5=9\)

For Exercises \(75-80,\) consider the following list: $$\begin{array}{llll} {18,} & {-4.7,} & {0,} & {-\frac{5}{9},} & {\pi,} & {\sqrt{17}, \quad 2, \overline{16},} & {-37} \end{array}$$ List all irrational numbers.