Sect. 1.5
Ex. 1
Solve ALGEBRAICALLY
GRAPHICALLY
Ex. 2
Solve 2(5 ­ 3x) = 8 ­ 3(x + 2)
algebraically
graphically
Ex. 3
Solve ­24x = 7 = 17 ­ 24x
Ex. 4
Solve 3 ­ 1/3x = ­1/3x + 3
Ex. 5
There are about 232,000 words in the Japanese language. This is 19% more that in the Russian language. How many words are in the Russian language?
Ex. 6
Delta Airlines' fleet includes B737/800's, each with a cruising speed of 531 mph and Saab 340B's, each with a cruising speed of 290 mph. Suppose that a Saab 340B takes off and travels at its cruising speed. One hour later, a B737/800 takes off and follows the same route, traveling at its cruising speed. How long will it itake the B737/800 to overtake the Saab 340B?
Ex. 7
Sam's 2 student loans total $12,000. One loan is a 5% simple interest and the other is a 8% simple interest. After 1 year, Sam owes $750 in interest. What is the amount of each loan?
Ex. 8
Metro Taxi charges a $2.50 pickup fee and $2 per mile traveled. Grayson's cab fare from the airport to his hotel is $32.50. How many miles did he travel?
2.50 + 2x = 32.50
-2.50
-2.50
2x = 30
x = 15 miles
zeros of a function
Set = to zero and solve
c is the zero of f if f(c) = 0.
zeros = x­intercepts = solutions of equation
Ex. 9
Find the zero of f(x) = 5x ­ 9
5x - 9 = 0
+ 9 +9
5x = 9
x = 9/5