2021 7 Algebra Test

The number which is missing from the following table with the rule ‘subtract five from each input number’ is:

• 9

• 11

• 13

• 15

• 17

With the input of 6, what would be the output if the rule is multiply by 5, then subtract 1?

• 31

• 29

• 30

• 27

• 25

With the output of 49, what would be the input if the rule is multiply by 5, then subtract 1?

• 10

• 246

• 10.8

• 9.6

• 244

When the formula $f\times3+14$  is written without its multiplication symbols, it simplifies to:

• f3 + 14

• 3f + 14

•  $14\ +\ 3\times f$  

• 14 - 3f 

By leaving out the multiplication signs, what should this equation look like:  $\left(w\times3-4\right)\times5-12$  

•  $\left(w3-4\right)5-12$  

•  $\left(3w-4\right)-7$  

•  $5\left(3w-4\right)-12$  

•  $-7\left(3w-4\right)$  

The formula for the following table is:

• $g=h-3$

• $h=g-3$

• $h=3g$

• $h=3+g$

• $h=2g-1$

If t is the input and k is the output, what is the formula for the table?

•  $k=2t+3$  

•  $t=2+3k$  

•  $k=2-t$  

•  $k=3t-2$  

•  $t=2k+5$  

In this expression, what is the coefficient of a?

2ab + 3a + 4ba + 5b + 6.

• 2

• 3

• 4

• 5

• 6

In this expression, what is the constant?

2ab + 3a + 4ba + 5b + 6.

• 2ab

• 3a

• 4ba

• 5b

• 6

What is this expression when simplified?

2ab + 3a + 4ba + 5b + 6.

• This expression cannot be simplified.

• 6ab + 3a + 5b + 6.

• 20ab.

• 14a²b² + 6

• 5ab + 9ba + 6