Solve using the substitution method. Use a graphing calculator to check your answer. 8x + 7y = 58x + 7y = 15
A. (8, 7)
B. (1, 1)
C. No solution
D. Infinitely many solutions
Answer: C
Mathematics
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Provide an appropriate response.A credit-card service charges a finance charge of 
% per month on the average daily balance of the account. If the average daily balance on an account is $321.82, what is the finance charge for the month?
A. $2.75 B. $8.85 C. $88.50 D. $7.53
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Evaluate f(x) at the given value of x.f(x) = 
; x = -8
A. - 
B. 
C. 1
D. 
Mathematics
Find the following using a calculator. Round to four decimal places.log (-7)
A. Does not exist B. 6 C. 2.0794 D. 1.9459
Mathematics
Simplify.(6 + 5)[7 + (4 + 5)]
A. 74 B. 480 C. 176 D. 810
Mathematics