Mathematic Revision

Express 4xy -2y -3y + 2xy -2y + 2x in its simplest form.

• 6xy - 7y + 2x

• 2xy - 5y -4x

• 4xy -6y -2x

• 3xy + 7y -3x

Factorise 4xy + 40x²

• 4x(y+10x)

• 4x(2y+10x)

• 2x(2y+10x)

• 2x(y+5x)

Factorise: 30xy - 12x + 10y - 4

• (6x-2)(5y+2)

• (5x+3)(5y-2)

• (5x-3)(5y+2)

• (6x+2)(5y-2)

Solve the following Questions:

6(2x-5) - (5-3x) = 10

• x=6

• x=4

• = 1

• x=3

The Ratio of boys to girl in a school is 3:2.

if there are 450 boys, how many girls are there?

What percent of the students are boys.

• 300 girls,

  60% boys

• 350 girls,

  55% boys

• 200 girls,

  45% boys

• 295 girls,

  50% boys

Last Year, Standley bought a car for $54 000. This year, the value of the car dropped to $49 680. What is the percentage decrease in the value of car?

• 10%

• 5%

• 8%

• 20%

John wants to have an interest income of $3,000 a year.

How much must he invest for one year at 8%

• $30 200

• $37 500

• $34 700

• $38 300

You invest $20,000 into an account paying 9% annual interest rate.

If the total interest earned that she earned is $1,550.

How long did she invest the money?

• 6 month

• 12 month

• 8 month

• 10 month

Hasan Cycle 18 km in 1.5hours.

Find his speed in Kilometres per hour.

• 8km/hr

• 10km/hr

• 12km/hr

• 14km/hr

A piece of wood is cut into e pieces A, B, & C, in the ratio 2:3:5. If C is longer than B by 8cm, Find the length of the piece of wood.

• 40cm

• 20cm

• 30cm

• 50cm