Aussie Maths & Science Teachers: Save your time with SmarterEd
Jagger makes and supplies fresh muffins to cafes in the city.
As the number of muffins he makes increases, the cost to make each muffin decreases.
He sells the muffins for the same price and takes the orders in multiples of 6.
Assuming the cost per muffin continues to follow the decreasing trend in the table, how much profit will Jagger make on an order of 30 muffins?
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Surf Grommets charge an hourly rate for surfing lessons and add a one-off charge of $45 for insurance.
The overall cost `(C)` is represented by the formula, `C = 30h + 45`, where `h` is the number of hours of lessons.
Mark has 11 hours of lessons with Surf Grommets.
How much does he pay?
| $86 | $330 | $375 | $825 |
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Onyx makes four dream catchers for a total cost of $160.
He sells two of the dream catchers for $40 each and another for $55.
For what price must he sell the fourth dream catcher to achieve a profit?
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more than $25 |
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less than $25 |
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exactly $25 |
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a profit is not possible |
Tran is a baker and sells 100 loaves of bread at the markets. Each loaf costs him $2.25 to make.
He sells 80 loaves for $4.95 each.
In the last hour of the market, he sells the last 20 loaves for $2 each.
What is the total profit or loss of the 100 loaves?
| `−$5.00` | `$211.00` | `$216.00` | `$436.00` |
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This graph shows the cost of a tow truck that charges a flat fee plus a cost per kilometre.
The expression to calculate the cost is
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`40 + (6 xx text{kilometres towed)}` |
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`40 + (10 xx text{kilometres towed)}` |
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`40 + (16.6 xx text{kilometres towed)}` |
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`40 + (100 xx text{kilometres towed)}` |
Chloe sells beach umbrellas from her beach shack for $20 each.
Chloe pays $480 rent per week for her beach shack and each beach umbrella costs her $12.
How many beach umbrellas does Chloe need to sell per week to equal her weekly costs?
12 people went to Sea World together in a bus.
Entry into Sea World was $44 per person and the total cost of the bus was $120.
Which expression shows the total cost of the trip for everybody?
| `(44 + 120) xx 12` | `44 + 12 + 120` | `(12 xx 44) + 120` | `12 xx 44` |
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A cement slab is laid in Bob's backyard that forms a 9 m × 3 m rectangle.
Bob is going to tile around the edge of his slab using one row of 300 mm × 300 mm tiles.
He will use 50% black tiles costing $8 per tile and 50% white tiles costing $5 per tile.
What is the total cost of the tiles he used?
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Ali joins a gym that has a fortnightly fee of $33.
Members pay an extra $12 per session if they want to do a special yoga class.
Which expression represents Ali's fortnightly gym bill if she does `x` yoga classes during the fortnight?
| `12x` | `33x` | `33x + 12` | `33 + 12x` |
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