91Ó°ÊÓ

In \(9-26,\) write each expression as the product of two binomials. $$ x^{2}+7 x+x+7 $$

Use the definition of subtraction to write each subtraction as a sum. \(8-5=3\)

Use the definition of subtraction to write each subtraction as a sum. \(7-(-2)=9\)

Perform the indicated operations and write the result in simplest form. \((2 x+3)\left(x^{2}+x-5\right)\)

Perform the indicated operations and write the result in simplest form. \(3 a+4(2 a-3)\)

In \(18-23,\) write and solve an equation or an inequality to solve the problem. In an algebra class, 3 students are working on a special project and the remaining students are working in groups of five. If there are 18 students in class, how many groups of five are there?

In \(9-26,\) write each expression as the product of two binomials. $$ 3 x^{2}-5 x-12 $$

Mrs. Menendez uses computer software to record her checking account balance. Each time that she makes an entry, the amount that she enters is added to her balance. Mrs. Menendez had a balance of \(\$ 52\) in her checking account and wrote a check for \(\$ 75 .\) a. How should she enter the \(\$ 75 ?\) b. How should her new balance be recorded?

Perform the indicated operations and write the result in simplest form. \(a^{3}\left(a^{2}+3\right)-\left(a^{5}+3 a^{3}\right)\)

The height \(h,\) in feet, of a golf ball shot upward from a ground level sprint gun is described by the formula \(h=-16 t^{2}+48 t\) where \(t\) is the time in seconds. When will the ball hit the ground again?