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WAEC Mathematics Past Questions & Answers - Page 107

531.

The diagram is a circle centre O. If < SPR = 2m and < SQR = n, express m in terms of n

A.

m = n2

B.

m = 2n

C.

m = n - 2

D.

m = n + 2

Correct answer is A

If < SPR = 2m then < SQR = 2m but < AQR was n

n = 2m

m = n2

532.

In the diagram, O is a circle centre of the circle PQRS and < PSR = 86o. If < PQR = xo, find x

A.

108o

B.

172o

C.

130o

D.

50o

Correct answer is B

No explanation has been provided for this answer.

533.

In the diagram, |QR| = 10m, |SR| = 8m

< QPS = 30o, < QRP = 90o and |PS| = x, Find x

A.

1.32m

B.

6.32m

C.

9.32m

D.

17.32

Correct answer is C

In right angled QPR

tan 30o = 10x+8

(x + 8) tan 30 = 10

x + 8 = 100.5773

x +8 = 17.3

x = 17.3 - 8

x = 9.32

534.

If x and y are variables and k is a constant, which of the following describes an inverse relationship between x and y?

A.

y = kx

B.

y = kx

C.

y = kx

D.

y = x + k

Correct answer is B

No explanation has been provided for this answer.

535.

Factorise completely: 32x2y - 48x3y3

A.

16x2y(2 - 3xy2)

B.

8xy(4x - 6x2y2)

C.

8x2y(4 - 6xy2)

D.

16xy(2x - 3x2y2)

Correct answer is A

No explanation has been provided for this answer.