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New exercises from Khan Academy 2020-04-07T22:19:41.118184
Updated: 2 hours 45 min ago

Polar & rectangular forms of complex numbers

Wed, 2020-02-26 18:01
Given a complex number in rectangular form, write it in polar form. Given a complex number in polar form, write it in rectangular form.


Tue, 2020-02-25 17:55
Test your knowledge of translation!

Tables from rules that relate 2 variables

Tue, 2020-02-25 16:38
Complete a table, identify coordinates, and identify inputs and outputs when given a two-variable rule.

Rational equations (advanced)

Tue, 2020-02-25 15:14
Solve equations that have one rational expression whose numerator and denominator are polynomial expressions.

Effect of concentration on pH change

Tue, 2020-02-25 09:50
Let's practice questions involving relationship between pH and concentration of H+ ions.

Equations reducible to quadratic equations (advanced)

Mon, 2020-02-24 17:02
Challenge problems involving equations which are reducible to quadratic equations

Multiply fractions and whole numbers

Mon, 2020-02-24 16:57
Practice multiplying a whole number times a fraction.

Equivalent whole number and fraction multiplication expressions

Mon, 2020-02-24 16:54
Practice seeing how one whole-number-times-fraction problem is the same as another.  Find equivalent multiplication expressions. 

Read Roman numerals

Mon, 2020-02-24 16:52
Let's learn how to read Roman numerals like LXVII by converting them into decimal numbers.

Using magnification formula for lenses

Mon, 2020-02-24 11:20
Let's practice problems involving the magnification formula for lenses.

Using the magnification formula for mirrors

Mon, 2020-02-24 09:39
Let's practice problems involving the magnification formula for mirrors.

Square-root equations

Sat, 2020-02-22 17:06
Solve square-root equations by first arranging them and then taking the square of both sides.

Membrane transport

Sat, 2020-02-22 00:52
Test your knowledge of membrane transport!

Non-Mendelian genetics

Sat, 2020-02-22 00:36
Test your knowledge of non-Mendelian genetics!

Basic cell structures

Fri, 2020-02-21 23:55
Test your knowledge on the structures of cells!

Add within 1000

Fri, 2020-02-21 22:48
Practice adding three-digit numbers. All sums are 1000 or less.

Multiply by 9

Fri, 2020-02-21 22:38
Multiply 9 times a number less than or equal to 10.

Multiply by 8

Fri, 2020-02-21 22:35
Multiply 8 times a number less than or equal to 10.

Multiply by 7

Fri, 2020-02-21 22:30
Multiply 7 times a number less than or equal to 10.


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