Chapter 1: Problem 24
CHECKING SOLUTIONS OF EQUATIONS Check whether the given number is a solution of the equation. $$p^{2}-5=20 ; 6$$
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Evaluate the expression for the given value of the variable. (Review 1.1) \(9 d\) when \(d=0.5\)
Use the following information. The surface area of a cylinder equals the lateral surface area \((2 \pi r \cdot h)\) plus the area of the two bases \(\left(2 \cdot \pi r^{2}\right)\). Write the expression for the surface area of a cylinder.
Evaluate the expression. $$\frac{1}{2} \cdot 26-3^{2}$$
You plan to start your own greeting card business. Your startup cost of buying a computer and color printer is \(\$ 1400 .\) You also want to run an ad for \(\$ 50\) a week for 4 weeks. You plan to sell each card for \(\$ 1.79\). How many cards must you sell to equal or exceed your initial costs? Write an inequality that models the situation. Solve the inequality to find the minimum number of cards you must sell.
CHECKING SOLUTIONS OF INEQUALTTIES Check whether the given number is a solution of the inequality. $$a(3 a+2)>50 ; 4$$
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