Find the determinant.det 
A. -45
B. -23
C. 3
D. -420
Answer: D
Mathematics
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Solve the problem.Dave can hike on level ground 3 miles an hour faster than he can on uphill terrain. Yesterday, he hiked 29 miles, spending 2 hours on level ground and 5 hours on uphill terrain. Find his average speed on level ground.
A. 6.7 mph B. 6.3 mph C. 4.1 mph D. 3.3 mph
Mathematics
Find the area of the triangle. If necessary, round the answer to two decimal places.a = 14, b = 32, c = 26
A. 5280.01 B. 177.99 C. 3219.69 D. 181.99
Mathematics
Solve the problem.Find the area A of a rectangle with length 20 yd and width 24 yd.
A. A = 960 yd2 B. A = 480 yd2 C. A = 44 yd2 D. A = 80 yd2
Mathematics
Eliminate the decimals by multiplying by a power of 10 and then solve.1.2x + 3.5 = 0.6x - 1
A. 0.133 B. -7.5 C. -7.51 D. -7.575
Mathematics