Using nth term
What is the third term of the sequence with nth term 7n – 5?
16
A function machine has the rule ‘add 7’.
What is the input when the output is 11?
4
What is 15% of $200?
30
What number do you multiply by to increase a value by 35%?
1.35
Monza says that 31 is the 7th term of the sequence
4n + 3. Is Monza correct? Show the solution.
yes
Which of these represent the function 'multiply by 3 and add 2'?
a. y = 3(x + 2)
b. y = 3x + 2
c. y = 2x + 3
d. y = 2(x + 3)
b. y = 3x + 2
Which method should you use to increase $200 by 15%?
a.$200 + 15
b.$200 + $30
c.$200 – $30
d.$200 − 15
b.$200 + $30
What number do you multiply by to decrease a value by 25%?
0.75
A sequence starts 10, 17, 24, … .Find nth term.
7n+3
Find the first three terms of the sequence generated by the function
y = 3x − 2.5
0.5; 3.5; 6.5
What is the absolute change when you increase 8 by 25%?
2
A value is multiplied by 0.27.
What is the percentage change?
decrease by 73%
What is the first negative term in the sequence given by the formula 28 – 3n?
10
y=2x+4. Find its inverse function.
x=(y-4)/2
In one year, the production at a factory increases from $100 000 by an absolute change of $100 000.
The percentage increase is:
100%
A box holds 35 identical items.
The size of the box is changed so that it now holds 28 of the same items.
Work out the percentage decrease in the number of items that the box holds.
20%
A sequence starts at 12 and the 3rd term is 6. Find nth term rule.
-3n+15
Find its inverse function. y=x/7-3
x=7(y+3)
Anna is using only 39% of the 60 GB memory on her computer.
How much free memory is left?
36.6
There were 52 399 wind turbines in China in 2016.
This is an increase of 22% on the number in the previous year.
How many wind turbines were there before the increase?
42950