Substitute to find the value of the expression.Traveling at r kilometers per hour for t hours, a driver will travel rt kilometers. How far will Danny travel in 12 hours at a speed of 54 kilometers per hour?
A. 4.5 km
B. 648 km
C. 648 mi
D. 66 km
Answer: B
Mathematics
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Simplify.(2t5)-2
A. 
B. 
C. 
D. 4t10
Mathematics
Solve. Round to the nearest tenth.A 26-ft-tall ladder is placed so that it reaches 20 ft up on the wall of a house. How far is the base of the ladder from the wall of the house?
A. 1076 ft B. 32.8 ft C. 16.6 ft D. 276 ft
Mathematics
Given matrix A, find the indicated minor or cofactor.Find the cofactor A12.A = 
A. 6 B. -1 C. 3 D. 1
Mathematics
Evaluate the algebraic expression for the given value or values of the variable(s).x2 - 2(x - y);
x = 8 and y = 3
A. 45 B. 54 C. -74 D. 51
Mathematics