Forming Algebraic Expressions

Which of these is another way of writing a + a + a + a?

• a⁴

• 4a

• aaaa

Which of these statements matches the expression:

a - 7

• 7 more than a

• a more than 7

• 7 less than a

• a less than 7

Another way of writing 9y is:

• 9 + y

• 9^y

• 3 x 3 + y

• 9 x y

A cube has b balls inside. Form an expression for the number of balls in the image.

• 9b

• 3b + 6

•  $b^3$  + 6

• 3b + 6b

Write an expression for the function machine

• h5 + 2

• 5h + 2

• 2h x 5

• 10h