Use a graphing calculator to solve the system. Express solutions with approximations to the nearest thousandth.
x + 
y - 3 = 0
x - y - 
= 0
A. ?
B. {(1.581, 0.289)}
C. {(1.099, 0.547)}
D. {(1.670, 0.443)}
Answer: B
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Decide whether events A and B are overlapping or non-overlapping.A person is selected at random from a group of doctors. Event A is that the person selected is a woman. Event B is that the person selected is a surgeon.
A. Non-overlapping B. Overlapping
First, use front end rounding to estimate each answer. Then find the exact answer.Light travels 186,000 miles per second. How many miles does it travel in 
A. estimate: 190,000 ? 800 = 152,000,000 miles; exact: 147,126,000 miles B. estimate: 190,000 ? 790 = 150,100,000 miles; exact: 147,126,000 miles C. estimate: 200,000 ? 790 = 158,000,000 miles; exact: 147,126,000 miles D. estimate: 200,000 ? 800 = 160,000,000 miles; exact: 147,126,000 miles
Find the mode or modes for the list of numbers.Ages of parents (in years) at the school: 20, 24, 46, 24, 49, 24, 49
A. 33.7 years B. 49 years C. 46 years D. 24 years
Factor the polynomial.7z4 - 59z2 - 36
A. (7z2 - 9)(z2 + 4) B. (7z2 - 4)(z2 - 9) C. (7z2 + 4)(z2 - 9) D. (7z3 + 4)(z - 9)