Write the expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression.
A. -
B. 
C. 
D. - 
Answer: A
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Find the y-intercepts for the parabola whose equation is given. If the y-intercepts are irrational, round your answers to the nearest tenth.y = -x2 + 19x - 90
A. y-intercept (0, -9) B. y-intercept (0, 90) C. y-intercept (0, 9) D. y-intercept (0, -90)
Insert a decimal point in the product.39.81 × 4.6 = 183126
A. 183,126. B. 18.3126 C. 1831.26 D. 183.126
Graph the system of inequalities. Indicate the solution by shading.2x + 3y ? 6 x - y ? 3 y ? 2
A. 
B. 
C. 
D. 
Provide an appropriate response.A shipment of 20 digital cameras contains two that are defective. A random sample of three is selected and tested. Let X be the random variable associated with the number of defective cameras in a sample. Find the probability distribution of X and the expected number of defective cameras in a sample.
What will be an ideal response?