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Help for what is on your timetable.

Choose the subject that matches your assignment, then find the decision it requires. Browse seven detailed guides with worked examples, original practice and explanations.

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Find your exact sticking point

What are you
working on?

Jump straight to the explanation you need.

34 topic routes. Choose an explanation below.

Math

Equations with x on both sides

Collect the variable terms, preserve equality and substitute to check.

Math

Brackets and negative signs

Distribute to every term or divide first when the structure allows it.

Math

Equations with fractions

Clear denominators while changing every term on both sides.

Math

Straight-line graphs

Connect slope, intercept and a simple system of equations.

Math

Right triangles and Pythagoras

Identify the hypotenuse before finding a missing side.

Math

Angles in triangles

Use marked facts and the appropriate angle relationship.

Math

Similarity and scale factors

Match corresponding sides and distinguish length from area scaling.

Math

Area versus perimeter

Choose the requested quantity and the correct dimensional unit.

Math

Fixed costs and hourly rates

Define the unknown and separate a one-off charge from a rate.

Math

Percentages and discounts

Identify the amount the percentage uses before calculating.

Math

Rate, time and unit conversions

Make time units agree with the rate, then interpret the result.

Science

Speed versus velocity

Distinguish total path length from displacement in a journey.

Science

Reading a motion graph

Use axis labels and changes over the requested interval.

Science

Net force and acceleration

Combine forces with direction before applying Newton’s second law.

Science

Work and energy

Use the force direction and the conditions of the energy model.

Science

Moles from mass

Distinguish mass, amount of substance and molar mass.

Science

Molarity and final solution volume

Convert volume to liters before finding amount per volume.

Science

Balancing chemical equations

Change coefficients while preserving each chemical formula.

Science

Limiting reactants

Use the balanced mole relationship to find which reactant runs out.

Science

Osmosis and water movement

State the membrane and solution conditions before choosing direction.

Science

Diffusion versus active transport

Compare what moves, the gradient and the energy requirement.

Science

Biology graphs and percentage change

Separate the observed pattern from its proposed cause.

English

Claims supported by a passage

Build an interpretation that the supplied words can justify.

English

Short quotations and analysis

Explain the role of the evidence instead of leaving the quote alone.

English

Literary devices and their effects

Explain what a device contributes to this particular passage.

Study tools

Prepare a homework photo

Keep the question, symbols, diagram and instruction readable.

Study tools

Ask for a hint or follow-up

Show your attempt and name the exact missing connection.

Study tools

Inspect a step-by-step solution

Locate the earliest transition you cannot justify.

Study tools

Improve an essay draft

Inspect the argument, evidence and limits before polishing the draft.

Study tools

Make flashcards and quizzes

Write focused recall tasks and verify the answers before practice.

Study tools

Plan tonight’s homework

Fit assignments, checks and a buffer inside the available time.

Study tools

Choose exam revision

Separate a concept gap, a wrong setup and an execution mistake.

Study tools

Rebuild a concept with a lesson

Connect an explanation, a visual relationship and a new attempt.

Study tools

Keep a useful error log

Record the first error, a correction and a fresh test.

Choose the assignment

A clearer way into
your next question.

Start with the subject, then find the kind of reasoning the question needs. Each guide includes a worked example, a request you can adapt in Lirno and checks that fit the task.

For work that crosses subjects, such as a physics word problem, use both the scientific model and the mathematical method.

Blue and white sculptural forms balanced beside a pencil

Algebra homework help

Algebra

Solve linear equations, handle brackets and fractions, and check a solution against a graph.

Explore the guide
Blue and white geometric pieces arranged as a tactile still life

Geometry homework help

Geometry

Choose the right triangle relationship, match similar sides and distinguish area from perimeter.

Explore the guide
A calm calendar, hourglass and notebook in blue and white

Math word problem help

Word problems

Model fixed fees, rates, percentages and comparisons, then return the answer to the story.

Explore the guide
A blue paper airplane above a gently looping paper ribbon

Physics homework help

Physics

Distinguish speed from velocity, read graph intervals and calculate with net force and units.

Explore the guide
A glass flask with blue liquid beside white study materials

Chemistry homework help

Chemistry

Calculate molarity, preserve formulas when balancing and use mole ratios with a limiting reactant.

Explore the guide
Blue paper leaves and a magnifying glass beside a notebook

Biology homework help

Biology

Explain osmosis under stated conditions, compare transport processes and interpret biological data.

Explore the guide
An open blue notebook, pencil and sculptural quotation marks

English homework help

English & writing

Use an original short passage to build a claim, select evidence and explain its effect.

Explore the guide

The right kind of help

Read the instruction.
Choose the next move.

A worksheet can ask for a numerical result and a written explanation about the same material. “Calculate the percentage mass change” needs a calculation using the initial mass. “Explain the change” needs the membrane and solution conditions. Choose the guide for the decision being asked, rather than selecting solely from the appearance of the numbers.

In math, inspect transformations, theorem conditions and the definition of an unknown. In science, connect measurements with a model, units and a mechanism. In English, develop a claim and explain how verified evidence supports it. The subject guide gives you a concrete place to begin.

When you open Lirno, show the full assignment and your attempt. Ask about the particular gap: choosing a formula, interpreting an arrow or revising an unclear sentence. A focused request gives the tutor context it cannot infer from a topic name alone.

After the explanation, do something with it. Complete a step, try a fresh question or rewrite a paragraph from the feedback. Keep the original task and course materials beside the response so you can check important details.

Follow the homework-to-practice workflow →

When a question crosses subjects

Follow both threads.
Keep one clear goal.

An assignment does not always stay inside one subject label. A science calculation can need algebra, and a biological explanation can need careful writing. Choose the guide for each decision while keeping the original instruction in view.

Science + math

Build the model.
Then calculate.

A solution contains 0.15 mol at a concentration of 0.30 mol/L. To find its final volume, begin with c = n/V, then rearrange to V = n/c. The result is 0.15/0.30 = 0.50 L. Choosing the scientific relationship and rearranging it are separate decisions.

Check by putting the volume back into the relationship: 0.15 mol / 0.50 L = 0.30 mol/L. Use chemistry to identify what each quantity measures and algebra to explain why the rearrangement is valid.

The science →The calculation →

Biology + explanation

Name the process.
Connect its causes.

A sample changes from 8.0 g to 8.8 g: a 10% mass gain. “The mass increased” describes the observation. An osmosis explanation also needs water permeability, the relevant solution conditions and a water-potential difference that supports net water entry.

Write the observation first, then connect the supplied conditions to the mechanism. If the question does not supply those conditions, distinguish a possible explanation from one the data establish. Use biology for the mechanism and writing guidance for a clear chain of reasons.

The process →The explanation →

Word problems + reading

Read the relationship.
Define the unknown.

Five tickets cost $52 in total. Adult tickets cost $12 and child tickets $8. Define a as the number of adult tickets; the number of child tickets is 5 − a. The total-cost equation is 12a + 8(5 − a) = 52.

Expanding and simplifying gives 4a + 40 = 52, so a = 3: three adult tickets and two child tickets. Check both conditions: 3 + 2 = 5 and 3 × $12 + 2 × $8 = $52. The reading establishes the model; algebra solves it.

The story →The reasoning →

FAQs

Find your starting point.

Which subject should I choose for a mixed question?

Start with the main task. For a physics word problem, use physics to identify the model and units, then use the word problem guide to build the equation.

Are these live AI answers?

The guides contain prepared examples and explanations. For a conversation about your own assignment, use Lirno through the official App Store link.

Does Lirno cover more subjects than these guides?

Lirno offers multi-subject tutoring beyond this starting collection. Include the topic, class level and full instruction when asking about another subject.

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Bring a math question, science diagram or English draft to Lirno.

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