For problems 1 - 3 find the discriminant and use it to describe the describe any real zeros.
A. 144, two rational zeros
B. 144, two irrational zeros
C. 
, two rational zeros
D. 
, no real zeros
E. None of these
Answer: A
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Solve and check the linear equation.0.40(30) + 0.70x = 0.60(30 + x)
A. {30} B. {70} C. {50} D. {60}
Solve the application involving a linear inequality and its graph. Carlos needs at least $380 to buy a new smartphone. He works x hours at a restaurant for $13 per hour and y hours as a tutor for $25 per hour. The inequality 
models the amount of money Carlos must earn to buy the new phone. The inequality is graphed below. 
Determine whether the ordered pair (15, 20) is a solution to the inequality and explain its real-world meaning.
A. (15, 20) is a solution. If Carlos works 15 hours at $25 per hour and 20 hours at $13 per hour, he will be able to purchase the new phone. B. (15, 20) is a solution. If Carlos works 15 hours at $13 per hour and 20 hours at $25 per hour, he will be able to purchase the new phone. C. (15, 20) is not a solution. If Carlos works 15 hours at $25 per hour and 20 hours at $13 per hour, he will not be able to purchase the new phone. D. (15, 20) is not a solution. If Carlos works 15 hours at $13 per hour and 20 hours at $25 per hour, he will not be able to purchase the new phone.
Simplify by using the order of operations. Round your answer to the nearest hundredth.3.72 + 7.8 - 4.8
A. 44.89 B. 6.7 C. 16.69 D. 10.4
Solve the equation using the quadratic formula. Simplify irrational solutions, if possible.x2 + 8x - 5 = 0
A. {-4 ± 2
}
B. {4 ± 
}
C. {-1 ± 
}
D. {-4 ± 
}