Page 761 - Algebra 1

Practice Distributed and Integrated
Use the quadratic formula to solve for x. Check the solutions.
*1.
(110)
*3.
(110)
4.
(37)
5.
(9 6)
6.
(Inv 7)
7.
(48)
*8.
(110)
*9.
(110)
*10.
(109)
x2 -2x-35=0 *2. x2 -10x+25=0 (110)
Multi-Step Determine why 16h2 + 25 = 40h has only 1 solution using the quadratic formula.
a. Rearrange the equation into the ax2 + bx + c = 0 form.
b. What is different about b2 - 4ac?
c. Generalize When will the equation ax2 + bx + c = 0 have only 1 solution?
Compare: 12,000 1.2 × 103.
Find the zeros of the function. y = x2 + 12x + 36
Describe the graph of an indirect variation when the constant of variation is positive.
Identify the outlier or outliers in the data set. numberofcarsforsixteenhouseholds: 3,2,2,1,2,3,6,2,1,1,3,2,2,2,1,3
Predict Use mental math to predict whether the quadratic formula is necessary to solve 3b2 + 15b - 20 = 0. Solve.
Soccer A1.5-meter-tallsoccerplayerbouncesasoccerballoffhisheadatavelocity of 7 meters per second upward. Use the formula h = -4.9t2 + v0t + h0 to estimate how many seconds it will take the ball to hit the ground.
Error Analysis For the system of inequalities graphed, Student A said that
(1, -4) is a solution of the system and Student B said that (4, 2) is a solution of the system. Which student is correct? Explain the error.
O
x
-4
-2
4
-2
11.
(109)
*12.
(109)
y≤2 Graph the system .
746
Saxon Algebra 1
-4
2
y
x≥2
Multi-Step A student group is planning on washing cars in an effort to raise at least
$300. They want to charge $5 for a basic wash, which will take about 10 minutes, and $15 for a detailed wash, which will take about 30 minutes. They have the car-wash
lot rented for 8 hours. Write and graph a system of linear inequalities to describe this situation. Explain your findings.