Sequences & others
5,9,13,17,21,…
Find an expression for the nth term of the sequence.
4n+1
Solve 4x+3=19
x=4
There are 500 students in Sri KDU Penang. 80 of them play volleyball. What percentage of students play volleyball?
16%
y = 3 - 4x
What is the gradient?
-4
1/3 / 4/5
1/3 x 5/4 = 5/12
How many squares of side 20 cm can be cut from a square card of side 3 m?
225
Expand and simplify (y+2)(y+8)
y2+10y+16
2 x 106 / 4 x 10-2
0.5 x 108 --> 5 x 107
Line A: y=3x+2, Line B: y=0.5x−4
Which line is steeper? Explain how you can tell by looking at the equations.
Since 3>0.5, Line A is steeper.
At the end of his trip, Adrian has 12,600 Thai baht to change into Malaysian ringgit.
The exchange rate is RM1 = 180 baht.
Work out how many ringgit Adrian receives.
RM70
A rectangle 1/4 metre wide has area 1 1/2 square metres. Work out the length of the rectangle.
6 metres
Solve 4(3y−1)=5y+10
y=2
Write the numbers in ascending order.
3 X 10-4, 34, 3 X 104, 3-4
3 X 10-4, 3-4, 34, 3 X 104
Find the midpoint of the line joining the points
A(2, 7)and B(10, 3).
(6,5)
A fair six-sided dice is rolled and a spinner with 4 equal sections (numbered 1 to 4) is spun.
How many possible outcomes are there in total?
24
The weight, w, of a girl is 36 kg correct to the nearest kg. Write down the error interval for w.
check with teacher
Rearrange 6x+3y=15 to make y the subject.
6x+3y=15
2x+y=5
y=5-2x
Sarah spent 30% of her money on a book, which cost $24. How much money did Sarah have at first?
$80
Line A: y=3x+2, Line B: y=-4x+4
Which line is steeper?
Line B
A cake recipe uses 50 g of sugar for every 0.4 kg of flour. Write the ratio of sugar to flour in the form 1:n
50:400
5:40
1:8
The rule for the nth term of a sequence is 4n−7
Find the first term in the sequence that is greater than 500.
4n-7>500
4n>507
n>126.75
n=127
Expand and simplify (y+3)(y+7)(y+4)
y3+14y2+61y+84
A shop has a sale.
Laptop: 25% off normal price
Tablet: 1/5 off normal price
A laptop has a sale price of £600. A tablet has a sale price of £480. Which item has the greater normal price?
Laptop: £800
Tablet: £600
The laptop has the greater normal price.
(2y4+2y4)2
16y8
Amira has a bag containing 15 green and 5 yellow counters. She puts some more yellow counters into the bag. She then picks a counter at random from the bag. The probability she picks a green counter is 3/7. How many more yellow counters did Amira put in the bag?
15