Financial Maths
Money earned at an hourly rate is called...
Wage
What trigonometry function do you use if you know the adjacent and the opposite sides?
tan
7x = 21
x= 3
x/4 = 10
x=40
Michelle receives a weekly salary of $1930, What is her annual Salary?
1930 x 26 = $50180
If $240 is invested at a rate of 5%p.a. for 9 years, how much simple interest is earned?
$108
What does SOHCAHTOA mean?
An easier way to remember the trig ratios
Combine the like terms:
2y + 10w + 6t – 8m – 15k
2y + 10w + 6t – 8m – 15k
2x - 1 = 9
x=5
Jimmy works as a labourer and is paid 22.50 per hour. How much does he earn for working 38 hours?
38 x 22.50 = $855
How much money is earned for a 48 hour work week where 8 hours is at time-and-a-half and the usual wage is $20/h?
$1040
Which way do you rotate when measuring true bearings?
Clockwise
3x + 2 = 14
x = 4
`4(2x - 1) = 12
x=2
Hannah has a job washing dogs. She is paid $2.75 per dog washed. Calculate what she earns when she washes 15 dogs in an afternoon.
2.75 x 15 = $41.25
What is the compound interest formula?
A = P(1+r)n
If the hypotenuse of a triangle is 16m and the adjacent if 4m, what is the unknown angle?
75.520
Expand and solve:
7(2x + 3) = 63
x=3
3x + 6 = 7x - 5
x=11/4
Mitchell is a manager at a local Target store. He is paid $80 080 per year. How much does he earn in a fortnight?
80 080 = 26 = 3080
Which account should I invest my money in to earn the most interest? An account earning 4.3% p.a. for 4 months, or and account earning 5.2% p.a. for 3 months? Both are compounded monthly.
4.3% p.a. for 4 months.
If a triangle has an angle of 400 and an opposite side of 15.4m, how long is the hypotenuse of the angle?
23.96m
9x + 2 = 4x + 12
x = 2
5(4x + 5) = 4(2x + 4)
-9/12
How much tax will you need to pay if you earn $5600 per year?
NIL