Identify the equation as either an identity or not.(sin ? + cos ?)2 = 1
A. Identity
B. Not an identity
Answer: B
Mathematics
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Solve the problem.Walt made an extra $7000 last year from a part-time job. He invested part of the money at 7% and the rest at 6%. He made a total of $450 in interest. How much was invested at 6%?
A. $3500 B. $3000 C. $5000 D. $4000
Mathematics
In the following group of computations, one answer is wrong. Use estimation to explain which answer is incorrect.(a) 7.16 × 12.01 = 85.9916(b) 33.7 × 3.87 = 1304.19(c) 5.142 = 26.4196
What will be an ideal response?
Mathematics
Provide an appropriate response.Write a problem in which the quadratic equation 
must be solved in order to solve the problem.
What will be an ideal response?
Mathematics
Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. 
Mathematics