NECO Past Questions and Answers - Page 136

676.

In Δ ABC, A = 60°, C = 90° and AC = 12m. Find the Length of the hypotenuse.

A.

24m

B.

14m

C.

12m

D.

7m

E.

6m

Correct answer is A

No explanation has been provided for this answer.

677.

Find the absolute mean deviation of the sample 10, 12, 14, 11, 13.

A.

14.6

B.

14

C.

12

D.

6.2

E.

1.2

Correct answer is E

No explanation has been provided for this answer.

678.

Simplify (6 - x - x2) ÷ (x2 - 4)

A.

(3 + x) ÷ (x + 2)

B.

(x - 3) ÷ (x - 2)

C.

(x - 3) ÷ (x + 3)

D.

(3 - x) ÷ (x + 2)

E.

(3 - x) ÷ (x - 2)

Correct answer is A

(6 - x - x2) = ( 2 - x ) ( 3 + x ) divides ( x^2 - 4 ) = ( -2 - x ) ( 2 - x ) = ( 3 + x ) / ( x + 2)

679.

If (x - a) is a factor of bx - ax + x2 - ab, what is the other factor?

A.

(x + b)

B.

(b - a)

C.

(x - a)

D.

(a + b)

E.

(a - b)

Correct answer is A

No explanation has been provided for this answer.

680.

Mohammed is 8 years older than Joy now. In five years’ time he will be twice as old as Joy. How old is Joy now?

A.

1\(\frac{1}{2}\)years

B.

3years

C.

4\(\frac{1}{2}\)years

D.

6 years

E.

ong>

Correct answer is B

No explanation has been provided for this answer.