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svetoff [14.1K]
2 years ago
12

Someone pls help I need this like now pls lots of points and brainliest

Mathematics
1 answer:
Serjik [45]2 years ago
8 0

Answer:

  • See below

Step-by-step explanation:

<h3>#7</h3>
  • 5⁵(16²5³)³ = 5⁵(2⁴)³(5³)³ = 5⁵2¹²5⁹ = 5¹⁴2¹²
<h3>#8</h3>
  • (8⁴5³/8⁵)² = (5³/8)² = (5³)²/(2³)² = 5⁶ / 2⁶
<h3>#9</h3>
  • (5⁸3⁷/5⁴)¹⁰ = (5⁴3⁷)¹⁰ = (5⁴)¹⁰(3⁷)¹⁰ = 5⁴⁰3⁷⁰
<h3>#10</h3>

<u>Multiplying powers with same base:</u>

  • a^b*a^c=a^{b+c}
  • Same base with powers added up

<u>Multiplying powers with same exponent but different base:</u>

  • a^b*c^b=(ac)^b
  • Same exponent with bases multiplied
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Answer:

The simpler way is:

SP = 0.85*RP

Step-by-step explanation:

Suppose that we have a given amount A. and now we take a given percentage, X%, off.

The new amount will be:

New amount = A - (X%/100%)*A = A*(1 - X%/100%)

This is the general formula.

In this case, we know that the store has advertised 15% off, then we have X% = 15%

Then if:

SP = sales price

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We will have the equation:

SP = RP - (15%/100%)*RP = RP - 0.15*RP

This is what Jill found, but if we use the general equation above, we will find that:

SP = RP*(1 - 15%/100%) = RP*(1 - 0.15) = RP*0.85

So we just need to multiply the regular price by 0.85 to get the sales price.

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Step-by-step explanation:

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Answer:

1, x = 80

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