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Exam

Exam

Pregunta

1.- Solve: 2(2x - 3) = 6 + x

a) x = 4

b) x = -4

c) x = 0

d) x = 3

Pregunta

2.- Solve: a) x = -2

b) x = 7

c) x = -7

d) x = 2

Pregunta

3.- Find out Veronica's age knowing that after 56 years it will be five times her current age.

a) 12 years old

b) 10 years old

c) 14 years old

d) 16 years old

Pregunta

4.- I answered a 20 questions test. If each of your answer is correct you win 3 points and if it is wrong, you lose 2 points. Find out the number of correct questions I answered if my final result was 30 points.

a) 14 questions

b) 15 questions

c) 16 questions

d) 13 questions

Pregunta

5.- Solve: x2 - 3x + 1 = 0

Respuestas

a) x = 2 and 3

b) x = 2

c) x = 5/2 and 1/2

d) x = (3 ± √5)/2

Pregunta

6.- Solve: x2 + x = 0

a)  x = 0 and -1

b) x = 0 and 1

c) x = 0

d) x = ±1

Pregunta

7.- Solve: x2 - 100 = 0

a) x = 10

b) x = -10

c) x = ±50

d) x = ±10

Pregunta

8.- The area of a rectangle is 162 m2, and the length doubles its width. Calculate its dimensions.

Respuestas

a) The length is 9 m and the width is 18 m

b) The length is 18 m and the width is 9 m

c) The length is 160 m and the width is 2 m

d) None of them

Pregunta

9.- Calculate two consecutive natural numbers whose porduct is 97656.

Respuestas

a) 312 and 313 or -312 and -313

b) 312 and 313

c) -312 and -313

d) None of them

Pregunta

10.- Solve: x2 - 8x + 7 = 0

Respuestas

a)  x = 1 and x = 7

b) x = -1 and x = -7

c) x = 1 and x = -7

d) There is no solution