Let x represent one number and let y represent the other number. Use the given conditions to write a system of equations. Solve the system and find the numbers.The sum of two numbers is 20. If one number is subtracted from the other, their difference is 7. Find the numbers.
A. 12.5 and 7.5
B. 13.5 and 6.5
C. 14.5 and 5.5
D. 10.5 and 9.5
Answer: B
Mathematics
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Graph the function. Describe its position relative to the graph of the indicated basic function.f(x) = e-0.4x; relative to f(x) = ex
A. Stretched vertically
B. Stretched horizontally
C. Stretched horizontally;
reflected across the y-axis
D. Stretched vertically;
reflected across the y-axis
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Evaluate the derivative at the given value of x.y = -
; x = -11
A. 
B. 
C. 
D. 
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The nth term of a sequence is given. Find the first 4 terms.an = 9 + 
A. 
, 
, 
, 
B. 16, 2, 16, 2
C. 16, 16, 16, 16
D. 2, 2, 2, 2
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Evaluate the expression.
A. 64 B. 7 C. 9 D. 8
Mathematics