Sum an appropriate infinite series to find the rational number whose decimal expansion is: 
.Enter just a reduced fraction of form 
.
Fill in the blank(s) with the appropriate word(s).
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Mathematics
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Simplify where possible. Then solve the equation.9 - 5 = 2r
A. r = 
B. r = 0
C. r = 2
D. r = 
Mathematics
Given cos? = 0.7801. Use a calculator to find ? to the nearest tenth.
a. ? = 38° b. ? = 38.7° c. ? = 51.3° d. ? = 0.7° e. ? = 0.9°
Mathematics
Determine whether the ordered pair is a solution of the given linear equation.2x + 5y = 4; (-3, -2)
A. no B. yes
Mathematics
List the first n terms of the geometric sequence satisfying the given conditions.a1 = 7, r = 2, n = 4
A. 7, 14, 28, 112 B. 7, 14, 28, 56 C. 2, 14, 98, 686 D. 7, 9, 11, 13
Mathematics