Solve.Four times the sum of some number plus 2 is equal to 8 times the number minus 28.
A. -36
B. 9
C. 36
D. -9
Answer: B
Mathematics
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Solve the problem.Suppose that z varies jointly with x and y and that z = 343 when x = 7 and 
Find the constant of proportionality k. Then, find z when x = 7 and y = 8.
A. k = 2.9; z = 162.4
B. k = 33,614; z = 
C. k = 3.9; z = 218.4
D. k = 3.5; z = 196
Mathematics
Find the exact value under the given conditions.sin ? = 
, 
< ? < ?; cos ? = 
, 0 < ? < 
Find sin (? - ?).
A. - 
B. 
C. 
D. 
Mathematics
Find the difference.- 
- 
A. - 
B. 
C. - 
D. - 
Mathematics
Find the rate of interest required to achieve the conditions set forth.If Jay bought a lot for $8,000 and sold it 15 years later for $24,000, what was her percentage rate of return on this investment if it was compounded annually?
A. 9.6825% B. 3.7995% C. 8.7104% D. 7.5990%
Mathematics