Use a formula to solve the problem.What is the area of a square with side 2.8 cm?

A. 7.84 cm2
B. 21 cm2
C. 5.6 cm2
D. 31.36 cm2

Answer: A

Mathematics

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Find the derivative of y with respect to x.y = sec-1 

A.
B.
C.
D.

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Solve the system of equations using elimination. 

A. (-2, 6) B. infinitely many solutions C. (6, -2) D. no solution

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The symmetric property of congruence allows us to conclude that if AB ? PQ, then

(a) PQ ? AB (b) PQ ? PQ (c) AB ? AB (d) All of these follow from the symmetric property. (e) Both (b) and (c) follow from the symmetric property.

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Solve.One number is 3 less than a second number. Twice the second number is 27 less than 5 times the first. Find the two numbers.

A. -14 and -11 B. 12 and 15 C. 10 and 13 D. 11 and 14

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Mathematics