Khan Academy Algebra

Solve: 91 = 7(x + 8)

• x = -5

• x = 90

• x = 5

• x = 1

Solve: -2(2x - 8) + 8x = 12

• x = 1

• x = -1

• x = 4

• x = -4

Solve: 2(x + 2) = -8

• x = -4

• x = 1,234,567

• x = 6

• x = -6

What is the second step needed to solve this equation:

4(x - 5) - 3x + 4 = 250

• Solve for x

• Add all the constants with the coefficients

• Combine Like Terms

• Distribute

Solve the following equation:

25 = -5(x - 2)

• x = -3

• x = 3

• x = 5

• x = -5

What is the main focus of the Algebra 1 course at the Poplar Bluff Excel Center?

• Foundational concepts in algebra for solving problems in mathematics and life

• Advanced calculus and trigonometry

• History of mathematics

• Biology and chemistry applications

What is one of the objectives of the course?

• Solve quadratic equations

• Solve linear equations and inequalities

• Study historical events

• Learn about world geography

What MISTAKE was made when simplifying the following?

• They forgot to multiply the 2 by 5. There should be a lead coefficient of 10 in the simplified answer.

• They should have multiplied the exponents of 3 and 5 together to get x raised to the 15th power.

• The did not apply the exponent of 5 to the coefficent of 2. The exponent should apply to everything in parenthesis.

• No mistake was made, it is simplified correctly.

• The answer should be x = 30

Are there any mistakes made in the equation solving process from step 1 to step 2 below? If so describe the mistake.

• No mistakes were made, step 1 to step 2 is correct!

Find the mistake!

• The bases of 1/4 and 8 were not correctly rewritten from step 1 to step 2

• The exponents should have been ADDED from step 2 to step 3.

• The bases can not be dropped from step 3 to step 4.

• The equation was not correctly solved from step 4 to step 5.