Question

1) What is the numerical coefficient of x2 in the expression 3x3 – 2x + 4? (i) 3 (ii) -2 (iv) 0 (iii) 4 2) Pick the odd one out from the following pairs of terms. (i) pq, 6pq (ii) 3x2y, 4yx? (iv) 15xpz, zpx (iii) - 17xy, 2yz 3) Ramu buys 3 kg of apples and 4 kg of oranges from a shop for 500. Which of the following linear equations can be used to represent this information? = (i) 3x + 4y = 500 (ii) 3x – 4y = 500 (iii) 4x – 3y = 500 = 3x (iv) 500 = 4y =
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Answer 1

The answers to the questions are given below:

1) The numerical coefficient of x² in the expression 3x³-2x+4 is 0 (option iv).

In the given expression, we don't have x². So, the coefficient will be zero.

2) The odd pair of terms will be -17xyz, 2yz (option iii).

The odd term is the one that is different from all other given terms. In the other three pairs, we have the variables in the second term of the pair as in the first term as well as the positive sign. For example, in pq, 6pq the variables are p and q. In 3x²y, 4yx the variables in both the terms are x and y. But in -17xy, 2yz we have a different variable 'z' in the second term as well as a negative sign in the first term.

3) The linear equation that can be used to represent the given information is 3x + 4y = 500 ( option i).

Let's take the price of apples per kg to be x and that of oranges to be y.

So, the price of 3 kg apples will be 3x and that of 4 kg oranges will be 4y.

Then, the equation will be 3x + 4y = 500.