Page 372 - Algebra 1

Lesson Practice
Tell whether the ordered pair is a solution of the given system.
(Ex 1)
a. (1, 3); 2x + y = 5
2x + 2y = 8
b. (3, 4); 2x + y = 5
2x + 2y = 8
Solve the system by graphing. Then check your solution.
(Ex 3)
c. y=2x-5
y=x-3 d. y=2x-5
3x + y = 15
e. Use a graphing calculator to solve the system and then check
Practice
Distributed and Integrated
Solve each equation. Check your answer. 1. 39.95 + 0.99d = 55.79
(24)
2. 12.6=4p+1 (24)
3. 2(b-4)=8b-11 (28)
4. 1.8r+9=-5.7r-6 (28)
Simplify.
5.
(32)
6.
(32)
7.
(32)
8.
(58)
_-4 k
2 10r-3t4
p-9q-4 _
r2s-3
Write A student is conducting a class survey. Write each question so that it is not biased.
a. Doesn’t milk taste better than the juice for lunch?
b. Isn’t math the best class?
c. Shouldn’t the class exercise in the morning?
(Ex 4)
f.
(Ex 5)
your solution. 2x + 3y = 6
y = x - 12
Savings Accounts Jill has $20 in her savings account and plans to deposit $5 each week. Jose has $5 in his account and plans to deposit $10 each week. After how many weeks will they have the same amount of money in their accounts? What is that amount?
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