Page 734 - Algebra 1

*16. Business The marketing group for a cosmetics company determined that the (104) expression u2 - 0.8u represents the profit for every 1000 units u of mascara sold.
How many units need to be sold to have a profit margin of $0.33?
Solve each equation. Check your answer.
17.
(99) )
19.
(10 0)
20.
(10 0)
21.
(101)
22.
(103)
23.
(103)
24.
(9 0)
25.
(91)
26.
(93)
27.
(9 6)
28.
(97)
29.
(98)
30.
(Inv 10)
__
60 + 45 = 3 *18. √ x = 9 4 x 5 x ( (1 1 0 0 6 6) )
Egg Toss Tyrese and Jameka were playing an egg-toss game. The egg’s
movement through the air formed a parabola given by the quadratic equation
h = -16t2 + 9t + 4, where h is the height in feet and t is the time in seconds. Find the maximum height of the path the egg makes and the time t when the egg hits the ground. Round to the nearest hundredth.
Solve x2 - 16 = 0 by graphing.
Tennis The weight w of a tennis ball should vary no more than _1 ounce from 2_1
12
ounces. Write an absolute-value inequality that models the acceptable weights.
What is the least acceptable weight?
Multiple Choice Which is the simplest form of _18 √ 7 ?
12
3 √ 28
A 3 B 3 C 6 √ 7 D 6 √ 7
___ 2 √ 287
Write Ant_on wants_to estimate the quotient of _√ 14 5 . How should he do this? 2 √ 9
2r
r - 4 12 - 3r
6 Subtract - .
Solve and graph ⎢x - 16⎢ ≤ 12.
Martha built a new playroom. She determined that the rectangular reading area
is (9x2 + 44x - 5) square feet. The width is (x + 5) feet. What is the length? Volleyball A server’s hand is 3 feet above the floor when it hits the volleyball.
After the volleyball is hit, it has an initial velocity of 23 feet per second. What is its height after 1 second? Use h = -16t2 + vt + s.
Multi-Step Tickets for the Valley High School production of Romeo and Juliet are $5 for adults and $4 for students. In order to cover expenses, at least $2500 worth of tickets must be sold.
a. Write an inequality that describes this situation.
b. Graph the inequality.
c. If 200 adult and 400 student tickets are sold, will the expenses be covered?
Generalize Consider the equation (x - 5)(x + 8) = 0. How can you quickly tell what the roots are?
The graph of f(x) = x2 + bx + 3 has an axis of symmetry x = 4. What is the value of b?
Lesson 106 719