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3 years ago

Whats the answer to 10×(2.5+13.5)

Mathematics

2 answers:

oee [108]3 years ago

7 0

Simplify 2.5 + 13.5 to 16

10 × 16

Simplify

160

spayn [35]3 years ago

3 0

first we add 13.5 by 2.5 which equals 16 and now we multiply 16 by 10 which equals 160 so your answer is 160.

please mark brainliest.

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PtichkaEL [24]

(a) $x^{-5}$

(b) $3x^{-7}$

Solution:

To write each of the given expression in the form $ax^n$ :

(a) $\frac{x^3}{x^8}$

Using exponential rule: $\frac{a^x}{a^y}=a^{x-y}$

$$\frac{x^3}{x^8}=x^{3-8}$

$$\frac{x^3}{x^8}=x^{-5}$

(b) $\frac{6x}{2x^8}$

Divide numerator and denominator by the common factor 2, we get

$$\frac{6x}{2x^8}=\frac{3x}{x^8}$

Using exponential rule: $\frac{a^x}{a^y}=a^{x-y}$

$$=3x^{1-8}$

$$\frac{6x}{2x^8} =3x^{-7}$

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$$\frac{28x^6}{21x^2}=\frac{4x^6}{3x^2}$

Using exponential rule: $\frac{a^x}{a^y}=a^{x-y}$

$$=\frac{4}{3}x^{6-2}$

$$\frac{28x^6}{21x^2}=\frac{4}{3}x^4$

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Step-by-step explanation:

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