Week 8 Pre

Which of the following represents the sum of four consecutive numbers?

• $x,\left(x+1\right),\left(x+2\right),\left(x+3\right)_{ }$

• $x+\left(x+1\right)+\left(x+2\right)+\left(x+3\right)$

• $x-\left(x+1\right)-\left(x+2\right)-\left(x+3\right)$

• $x\times\left(x+1\right)\times\left(x+2\right)\times\left(x+3\right)$

Which algebraic expression represents that Andrew is 5 more than half of Maddy's age?

• $A=\frac{1}{2}M+5$

• $M=\frac{1}{2}A+5$

• $A+5=2M$

• $A+5=\frac{1}{2}M$

Four boxes of chocolates and three loose chocolates is represented by the algebraic expressions 4C + 3. What does C represent?

• The number of boxes of chocolates

• The number of chocolates in one box

• The total number of chocolates

• The number of loose chocolates

Evaluate the expression
 $x-y+7$ 
when  $x=\frac{1}{2}$  and  $y=4$  

Which of the following is equivalent to the expression:
 $-2\left(a-3\right)$  

•  $-2a+6$  

•  $-2a-6$  

•  $-2a-3$  

•  $2a-6$  

Is the following equation TRUE or FALSE: 

 $4+3a=7a$ 

• True

• False

Simplify
 $4xy\times3x$  

•  $12xy$  

•  $12x^2y$  

•  $12y$  

•  $7xy$  

•  $7x^2y$  

Factorise the following
 $4a^2b-2ab$ 

•  $2ab\left(2a\right)$  

•  $2ab$  

•  $2a^2b$  

•  $2ab\left(2a-1\right)$  

Solve for the value of  $a$ :
 $-8+2a=2$  

Which of the following represents the correct algebra for solving:  $4a-7=2$  

•  $a=2-7-4$  

•  $a=\frac{2+7}{4}$  

•  $a=\frac{2}{4}+7$