A triangle has vertices  figure 1.png)
Use a determinant to find its area.
 figure 2.png)
 answer.png)
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?Which of the following is not true about subtraction of integers: ?
A. ?If a> b, then a - b> 0 B. ?If a< b, and b is positive, then a is negative. C. ?Given that p represents a positive unit and n represents a negative unit, 3 - 5 can be represented as follows: pppppnn subtract ppppp equals nn. D. ?Given that p represents a positive unit and n represents a negative unit, 4 - (-3) can be modeled as follows: pppppppnnn subtract nnn equals positive 7. E. ?Using a number line, one can find the 3 - 4 by starting at 3 and moving 4 to the left to result in –1.
Factor by grouping.3a3 - 6a2 + 7a - 14
A. (3a2 - 2)(a + 7) B. (3a2 + 7)(a - 2) C. (3a2 + 1)(7a - 2) D. (3a + 7)(a2 - 2)
Estimate the value as a whole number or as a mixed numeral where the fractional part is 
. 315 ÷ 5
A. 63
B. 61
C. 62
D. 64
z = f (x, y) = y ?x; a = 25, b = 5, x = 7.28, y = 8.51
For the following functions, use linearization and the values of z, 
at (a b) to estimate z (x, y) .