Provide an appropriate response.
Find the value of x given that the two triangles, ?ABC and ?DEF, are similar.

A. 38.5
B. 21.6
C. 7.3
D. 12.6


Answer: D

Mathematics

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Solve the system by the substitution method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.

A. {(-1, 0)} B. no solution; ? C. {(-1, 1)} D. {(-2, 1)}

Mathematics

Solve the problem. Round to the nearest tenth unless indicated otherwise.The force needed to keep a car from skidding on a curve varies jointly as the weight of the car and the square of the car's speed, and inversely as the radius of the curve. If a force of   is needed to keep an  car traveling at 20 mph from skidding on a curve of radius  what force would be required to keep the same car from skidding on a curve of radius 

src="https://sciemce.com/media/4/ppg__refe0512191816__f1q57g4.jpg" alt="" style="vertical-align: -4.0px;" /> at  Round your answer to the nearest pound of force.

A. 20,962 lb
B. 21,664 lb
C. 21,126 lb
D. 21,094 lb

Mathematics

Use a graph or a table to find the limit.

A. 5 B. 0 C. ? D. -?

Mathematics

Evaluate the sum.

A. 21 B. 16 C. 13 D. 15

Mathematics