Add or subtract as indicated.- 
+ 
A. - 
B. 
C. 
D. 
Answer: A
Mathematics
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Find a Cartesian equation for the line whose polar equation is given.r cos
= 4
A. y = x + 4
B. y = x - 8
C. y = 
x - 8
D. y = x + 4
Mathematics
Use the rules of exponents to simplify the expression. Use positive exponents to write the answer.(-3x-4y-6)2
A. 
B. - 
C. 9x8y12
D. 
Mathematics
Solve the problem. Round to two decimal places unless otherwise indicated.If the average cost per unit C(x) to produce x units of plywood is given by C(x) = 
, what is the unit cost for 50 units?
A. $-4.00 B. $5.00 C. $0.60 D. $6.00
Mathematics
Find the mean. Round to the nearest tenth when necessary.The numbers of miles John ran over the last six days were as follows: 6, 5, 9, 4, 13, 10
A. Mean = 7.8 miles B. Mean = 9.4 miles C. Mean = 6.3 miles D. Mean = 8.3 miles
Mathematics