Solve.5(x + 7) - 4x = -6
A. -41
B. 29
C. 41
D. -29
Answer: A
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Find the mass of the wire that lies along the curve r and has density ?.r(t) = 
i + 5tj, 0 ? t ? 1; ? = 5t
A. 
units
B. 
units
C. 
units
D. 
units
Use the table of values of f to estimate the limit.Let f(x) = 
, find 
f(x).
A. 
; limit = 0.8333
B. 
; limit = 0.65
C. 
; limit = 0.75
D. 
; limit = 0.85
Find the standard deviation of the data.Christine is currently taking college astronomy. The instructor often gives quizzes. On the past seven quizzes, Christine got the following scores. Find the standard deviation. Round to the nearest tenth.47 11 39 21 15 44 63
A. 8228.6 B. 39 C. 10,422 D. 19.1
Solve.Steve and Kim have put in a new tile entryway in their house. The tiles measure 8 × 8 in. and have grout joints 
in. wide. Use the diagram to find the width of the entryway.
A. 280 in2
B. 40
in.
C. 40
in.
D. 2308
in2