Mental Calculations - Algebra

If y=7,find the value of 2(y+4)

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• 22
• 20

If a=6 and b= 7,find the value of 15-a-b

• 2
• 3
• 4

When x = 3, y = 6 and z = 7, find 2x - z

• -1
• -2
• -3
• -4

If a = 4 and b = 6, what is the value of 3a + 5b?

• 40
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• 44
• 46

If x = 5, find the value of 7x-1.

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• 36
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• 37

If y = 7, find the value of 2(y+4).

• 11
• 22
• 20
• 12

Expand and simplify

(y + 3) (y + 5)

• y² + 8y + 15

• 9y³ + 15

• y2 + 8y + 15

• y² + 15x + 8

Expand and simplify

(p + 5) (p - 1)

• p² + 4p - 4

• p² + 6p - 4

• p² + 4p - 5

• p² - 4p - 5