Page 355 - Algebra 1

k. Hector throws a baseball up into the air, and at the same time, Jonas
(Ex 5)
throws a another baseball upward. The expressions below represent the height of the baseballs at time t.
Hector’s baseball: -16t2 + 22t + 4
Jonas’s baseball: -16t2 + 17t + 6
Write an expression for the difference in height between the two throws.
Practice
Distributed and Integrated
Simplify each expression.
1.
(4)
2.
(4)
3.
(50)
4.
(50)
5.
(37)
6.
(38)
7.
(38)
8.
(4 0)
9.
(43)
10.
(44)
18-12+42
-2[7 + 6(3 - 5)]
Graph the inequality x ≤ 8.
Write an inequality for the graph shown below.
1234
Compare: 0.00304 3.04 × 10-4.
Factor the polynomial 18a2b3c - 45ab6c completely.
Rockets The formula h = -16t2 + 80t + 8 can be used to find the height of a rocket that is launched into the air from 4 feet off the ground with an initial velocity of 80 feet/second. Write the formula by factoring the right side of the equation using the GCF.
Simplify the expression (3a)(6a2b)3.
_
Automotive Performance The ratio 40 + 6t compares the speeds of a car starting
11.
(45)
12.
(46)
the simplified form of the expression?
Multi-Step The inflation rate, the rate at which the things people buy and use increase in price, is constantly changing. During the first month of 2007, the inflation rate was 2.08%. By the sixth month, the rate had changed to 2.69%.
a. Graph this information on a coordinate plane as 2 points connected by a line
segment.
b. What is the slope of the line segment?
c. Predict Use the slope to predict the probable inflation rate for July of 2007.
Write What phrases can be used to indicate the inequality ≥? Write the expression -√b with a fractional exponent.
20 + 10t
from two different cruising speeds after an acceleration lasting t seconds. What is
340
Saxon Algebra 1