DL Pre-Algebra Challegne

Solve for the variable:

 $w\ +\ 2\ =\ 10$  

•  $w\ =\ 12$  

•  $w\ =\ 5$  

•  $w\ =\ 8$  

•  $x\ =\ 2$  

Solve for the variable:

 $2x\ =\ 10$  

•  $x\ =\ 20$  

•  $x\ =\ \frac{1}{5}$  

•  $x\ =\ 12$  

•  $x\ =\ 5$  

Solve for the variable:

 $\frac{x}{5}=\ -2$  

•  $x\ =\ 3$  

•  $x\ =\ 10$  

•  $x\ =\ -10$  

•  $-25\ =\ x$  

*FLASHBACK*
 $\frac{2}{3}\left(\frac{1}{5}\right)$  

•  $\frac{3}{8}$  

•  $\frac{2}{15}$  

•  $\frac{2}{8}$  

•  $\frac{1}{4}$  

What would be the FIRST step in solving for the variable in the problem below?

 $\frac{1}{2}x\ -\ 5\ =\ 12$  

• add 5 to both sides
  
  

• Mutliply both sides by the reciprocal

• Do work on only one side of the problem to see how Reinhardt will react;0!

• subtract 5 on both sides

What is this PROPERTY called in the problem and next step below?

2(x - 3)

2x - 6

• The multiplciation property

• The Communative Property

• The Distributive Property

• Combining Like Terms

*FLASHBACK* What is PRIME Notation?

• A type of transformer

• The way to write an ordered pair that has been moved from it's original position, eg. A'

• Something you do when factoring square roots

• The Pythagorean Theroem

Solve for x.
 $5x\ +\ 6\ =\ 2x\ +\ 12$  

•  $x\ =\ 3$  

•  $x\ =\ 2$  

•  $x\ =\ 1$  

•  $x\ =\ x$  

Which of the following statements are FALSE?

• The 'alligator' eats the bigger number.

• When multiplying or dividing an inequality by a negative number, reverse the sign.

• A negative multiplied by a negative is a positive.

• Same signs, keep and subtract.

*FLASHBACK* Which of the formulas below is used to find the area of a triangle?

• 
  

  $A\ =\ bh$
  

• $A\ =\ \frac{1}{2}bh$

• $A\ =\ \frac{1}{2}h\left(b_1\ +\ b_2\right)$

• $A\ =\ \pi r^2$