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Maths 1 Mark Question

Linear Equations in One Variable · Maharashtra Board STD 7 (MSBSHSE - English Medium). 13 questions.

Questions

1 Mark Question

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13 questions · self-marked practice — reveal the answer and mark yourself.

Question 11 Mark
Write $‘T$ for true and $‘F’$ for false for the following:
The coefficient of $x$ in $x^2 - 3x + 5$ is $3.$
Answer
False.
Solution:
The coefficient of $x$ in $-3$
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Question 21 Mark
Write the coefficient of x in of the following:
$-\frac{3}{2}\text{abx}$
Answer
Co-efficient of x in the given numbers are:
$-\frac{3}{2}\text{ab}$
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Question 31 Mark
Write the coefficient of x in of the following:
-5xy
Answer
Co-efficient of x in the given numbers are:
-5y
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Question 51 Mark
Write ‘T for true and ‘F’ for false for the following:
$(3 x+5 y)(3 x-5 y)=\left(9 x^2-25 y^2\right)$.
Answer
True.
Solution:
LHS $=(3 x+5 y)(3 x-5 y)$
$=3 x(3 x-5 y)+5 y(3 x-5 y)$
$=9 x^2-15 x y+15 x y-25 y^2$
$=9 x^2-25 y^2$
L.H.S = R.H.S.
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Question 71 Mark
Write 'T for true and ' $F$ ' for false for the following:
If $a =2$ and $b =\frac{1}{2}$, then the value of $a b\left(a^2+b^2\right)$ is $4 \frac{1}{4}$
Answer
True.
Solution:
$\left(a^2+b^2\right)$
$=\left[2^2+\left(\frac{1}{2}\right)^2\right]$
$=4+\frac{1}{4}$
$=4 \frac{1}{4}$
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Question 81 Mark
Write ‘T for true and ‘F’ for false for the following:
(5x - 7) - (3x - 5) = 2x - 12.
Answer
False.
Solution:
LHS = (5x - 7) - (3x - 5) = 5x - 7 - 3x + 5 = 2x - 2.
LHS = RHS
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Question 121 Mark
Write ‘T for true and ‘F’ for false for the following:
in -x, the constant term is -1.
Answer
False.
Solution:
The coefficient of x is -1.
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Question 131 Mark
Write the coefficient of x in of the following:
$2xy^2z$
Answer
Co-efficient of x in the given numbers are:
$2y^2z$
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