# Maths Exam Algebra & Number Year 9

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This is a quiz to revise maths in number and algebra for year 9's

• 1.

### Simplify: 14k-6y+11k-y

Explanation
The given expression involves combining like terms. We have 14k and 11k, which can be combined to give 25k. Similarly, we have -6y and -y, which can be combined to give -7y. Therefore, the simplified expression is 25k-7y.

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• 2.

### Simplify: 2k+3k+4k-2k

Explanation
The given expression can be simplified by combining like terms. The terms 2k, 3k, 4k, and -2k can be added together, resulting in 7k. Therefore, the simplified form of the expression is 7k.

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• 3.

### Substitute: if w=9, x=4,y=-2 WX divided by Y=?

• A.

-36

• B.

-18

• C.

36

• D.

18

B. -18
Explanation
To find the value of WX divided by Y, we substitute the given values of w, x, and y into the expression. Since w is 9, x is 4, and y is -2, we have (9 * 4) / (-2). This simplifies to 36 / -2, which is equal to -18. Therefore, the correct answer is -18.

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• 4.

### Put these in decending order: 9.37, 9.27,9.35,9.356,9.289,9.305

9.37,9.356,9.35,9.305,9.289,9.27
Explanation
The given numbers are arranged in descending order based on their values. Starting from the highest value, the numbers are: 9.37, 9.356, 9.35, 9.305, 9.289, 9.27.

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• 5.

### d+d+d+d+d+d+a-i

• A.

6da-i

• B.

• C.

6+1a-i

A. 6da-i
Explanation
The given answer is obtained by combining the individual elements in the given sequence: d+d+d+d+d+d+a-i. By combining the six instances of "d" together, we get "6d". Then, by combining the "a" and "-i" together, we get "a-i". Therefore, the correct answer is "6da-i".

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• 6.

### -6 times 3= 18

• A.

True

• B.

False

B. False
Explanation
-6 times 3 is not equal to 18. The correct result is -18. When you multiply a negative number (-6) by a positive number (3), you get a negative result.

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