3 years ago

Simplify the expression. 8x + 7 – 3x

Mathematics

2 answers:

marshall27 [118]3 years ago

8 0

8x + 7 -3x=
15x - 3x=
12x

DIA [1.3K]3 years ago

6 0

5x+7
Hope this helps :)

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To find:

The value of '?' in the following expression:

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First of all, let us have a look at a few rules of the exponents:

$1.\ a^b.a^c=a^{b+c}$

$2.\ a^b.a^{-c}=a^{b-c}$

Let us apply these rules and try to find out the missing value ('?') in the given expression.

Left Hand Side (LHS):

$x^2y^8.x^3y^?\\\Rightarrow x^2.x^3.y^8.y^?\\\Rightarrow x^{2+3}y^{8+?}\\\Rightarrow x^{5}y^{8+?}$

Now, let us compare the LHS with RHS, we get:

$x^{5}y^{8+?} = x^{5}y^{5}$

Dividing with $x^5$ on both sides:

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Therefore, the missing value in the expression is <em>-3.</em>

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