Factor the GCF from each term in the expression.x(x + 9) + 8(x +9)
A. (x +9)(x + 8)
B. 8x(x +9)
C. 9x(x + 8)
D. (x2 + 9x) + (8x + 72)
Answer: A
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Provide an appropriate response.A data set consists of 9 values which are all different. Which of the following is possible?
A. The mode is equal to the second smallest value. B. The median is equal to the second smallest value. C. The mean is equal to the second smallest value. D. None of the above is possible.
Simplify.(3i)5
A. -243 B. 243 C. -243i D. 243i
Solve the problem.When light travels from one medium to another-from air to water, for instance-it changes direction. (This is why a pencil, partially submerged in water, looks as though it is bent.) The angle of incidence ?i is the angle in the first medium; the angle of refraction ?r is the second medium. (See illustration.) Each medium has an index of refraction-ni and nr, respectively-which can be found in tables. Snell's law relates these quantities in the formula ni sin?i = nr sin ?rSolving for ?r, we obtain ?r = sin-1 src="https://sciemce.com/media/4/ppg__tttt0506191043__f1q5g2.jpg" alt="" style="vertical-align: 0.0px;" height="174" width="173" />
What will be an ideal response?
Find ?r for fused quartz (ni = 1.46), ethyl alcohol (nr = 1.36), and ?i = 8.5°.
Perform the indicated operation. Simplify the result if possible.15 ft 6 in. ÷ 3
A. 6 ft 2 in. B. 5 ft 3 in. C. 2 ft 5 in. D. 5 ft 2 in.