Algebraic expressions can be expanded - multiplied by one or more terms. They may also be simplified – made shorter and simpler by collecting like terms. Multiply \(-3\) by \(-4\) using the rule for ...

Fifty years ago Bob Moses organized volunteers to register voters in Mississippi during the Freedom Summer. And for decades, Moses has been fighting for civil rights as an educator. He won a MacArthur ...

During Math classes in schools some students thrive on solving equations, while others feel lost in a sea of numbers and formulas. For educators, the challenge lies in striking the perfect balance: ...

Expanding brackets means multiplying everything inside the bracket by the letter or number outside the bracket. For example, in the expression \(3(m + 7)\) both \(m\) and 7 must be multiplied by 3: ...

A number is divisible by 9 if the sum of its digits is greater than or equal to 9. 621 (6+2+1=9), for instance, is divisible by 9. Simply move the decimal point one place to the left to find the 10% ...