Page 831 - Algebra 1

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Solve this system by graphing:
Use the discriminant to find the number of real solutions of the equation
9x2 -24x+16=0.
Business A baseball-card seller models the costs for attending a sale as the
function y = $250 + $0.25√ n + 3 0. In this function, n represents the number of cards sold and 30 is the number of cards given out free as prizes. What is the domain of the function? Explain.
Graph the cubic function y = x3 - 2. Use the graph to evaluate the equation forx=0.
Verify Show that a $500 investment earning 6% interest compounded annually for 3 years will earn more than earning 6% simple interest for 3 years.
Multiple Choice $1000 is invested in an account paying 5% interest compounded quarterly. What is the value of the account after 20 years?
y = x2 - 2 y = 2x - 5
816
Saxon Algebra 1
A $1282.04 Find 8C3.
B $2000
C $2653.3_0 D $2701.48 24. Simplify 6 .
(103) √7 - 3√ 5 Solve -2m2 - 12m = 10 by completing the square.
Multi-Step The expression -√ x - 4, where x is the time in seconds, represents the change in temperature as water cools when ice cubes are placed in a glass of water.
a. For what value of x is the temperature change equal to -4 ?
b. What must be done to isolate the radical when solving for x? c. Graph the radical equation y = -√ x - 4.
Identify the function family to which y = 100(-3x) belongs.
Write Explain why you would not use the quadratic formula for the equation
x2 - x - 2 = 0 ?
Verify Use the formula for permutations to verify that 6P2 = 30.
Given the function f (x) = ax2 + bx + c, describe the general shapes of the graphs off(x)when:
a. a ≠ 0 and b ≠ 0;
b. a = 0 and b ≠ 0; c. a ≠ 0 and b = 0; d. a = 0 and b = 0.