KhanAcademyExercises
Changes in equilibrium
This exercise practices finding a new equilibrium price and quantity when supply changes, demand changes, or both supply and demand are changing simultaneously.`
Divide whole numbers to get a decimal (1-digit divisors)
Dividing whole numbers to get a decimal quotient like 15÷6=2.5
Making conclusions about slope
Make conclusions in a t test for slope based on the p-value and significance level, or from a confidence interval.
Add and subtract fractions word problems (same denominator)
Practice solving word problems by adding and subtracting fractions. The fractions used in these problems have like (common) denominators.
Interpret two-way tables
Do you understand how two-way tables really work? Here's your chance to practice. Go get 'em! You got this!
Coordinate plane word problems (quadrant 1)
See how we can use the axes on the coordinate plane to represent quantities.
Graph data on line plots
Record measurements on line plots (also called dot plots) using rulers and frequency tables.
Phasor diagrams for pure circuits
Let's solve some problems where we identify which phasor diagrams correspond to which circuits and vice-versa.
Relating phasors to trigonometric equations
Let's solve some problems to better understand how phasors represent trigonometric equations with different phases. This brings us a step closer to using phasors to analyze physical quantities that vary sinusoidally.
Plant kingdom
Overview of plants, alternation of generations
Understand: forces and acceleration
Check your understanding of forces and acceleration in this set of free practice questions aligned to NGSS standards.
Understand: gravitational forces
Check your understanding of gravitational forces in this set of free practice questions aligned to NGSS standards.
Determine translations
Given two figures on the coordinate plane, find the formal definition of the translation that takes one figure to another.
Dilate triangles
Given a figure and a definition of a dilation, select or manually draw the image.
Pythagorean theorem challenge
Solve real-world problems that can be modeled by right triangles, using the Pythagorean Theorem!
Trigonometric ratios in right triangles
Given the side lengths of a right triangle, find the sine, cosine, or tangent of one of the acute angles.
Rigid transformations: preserved properties
Identify which properties of shapes remain the same after a rigid transformation (reflection, rotation, translation) has been applied.
Find measures using rigid transformations
Use your knowledge about the effects of rigid transformations to solve problems about figures and their images under transformations.
Dilations: center
Given a figure and its image under a dilation, determine the dilation's center point.
Classification of fungi
This exercise tests the understanding of the general principles of the classification of fungi.
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