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3 years ago

13

Michael bought a soccer ball for $15. It was 40% off the original price. What fraction represents the amount of the original pri

ce he paid?
A.4/10
B.3/8
C.3/5
D.2/5

I WILL MARK YOU BRAINLIEST

2 answers:

valentinak56 [21]3 years ago

5 0

Answer:

B i think

Step-by-step explanation:

CaHeK987 [17]3 years ago

4 0

Answer:

I think it is 2/5

Step-by-step explanation:

40% as a fraction = 2/5

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<img src="https://tex.z-dn.net/?f=4%20%5Ctimes%208%20%5E%7B2x%20%2B%201%3F%7D%20%20%3D%2032%20%5E%7Bx%20%2B%202%7D%20" id="TexFo

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Answer:

x = 5

Step-by-step explanation:

<u>__________________________________________________________</u>

<u>FACTS TO KNOW BEFORE SOLVING</u> :-

$a^x \times a^y = a^{x+y}$

In an equation , if the bases are same in both L.H.S. & R.H.S. then , the power of the bases on both the sides of equation should be equal. For e.g. : $a^x = a^y$ ⇒ $x = y$ [∵ Bases are equal on both the sides]

<u>__________________________________________________________</u>

$4 \times 8^{2x+1} = 32^{x+2}$

Lets express it in terms of 2.

$=> 2^2 \times 2^{3 (2x+1)} = 2^{5(x+2)}$

$=> 2^2 \times 2^{6x+3} = 2^{5x+10}$

$=> 2^{2 + 6x+3} = 2^{5x+10}$

$=> 2^{6x+5} = 2^{5x+10}$

Here the bases on both the sides are equal. Hence ,

$=> 6x + 5 = 5x + 10$

$=> 6x - 5x = 10 - 5$

$=> x = 5$

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