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AleksandrR [38]
2 years ago
13

Stefan sells Jin a bicycle for $138 and a helmet for $18. The total cost for Jin is 130% of what

Mathematics
1 answer:
lys-0071 [83]2 years ago
5 0

Answer:

1. $109.20 2. $46.80

Step-by-step explanation:

Doing the math, we find that 30% of 156 (138+18) is 46.80, which answers the second part of this problem. Plugging this value into the first part of the equation gives us what Stefan originally paid.

Good luck! Hope this helps!

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3 years ago
{3x=7y=5<br> {5x-2y=-19
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Answer:

(-3, 2)

Step-by-step explanation:

{3x=7y=5

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solve....

maybe it was  3x + 7y = 5

and  5x - 2y = -19

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How do you factor 125-x^3?
xz_007 [3.2K]

Step-by-step explanation:

We have

125 - x {}^{3}

First, 125 is a perfect cube because

5 \times 5 \times 5 = 125

and

x^3 is a perfect cube because

x \times  x \times x = x {}^{3}

so we can use the difference of cubes identity

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Let say we have two perfect cubes:

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and 27 because 3×3×3=27 and let subtract

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(4 - 3)( {4}^{2}  + 4(3) + 3 {}^{2} )

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So the difference of cubes works for real numbers. This is a good way to help remeber the identity using real numbers.

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we know that 5 is cube root of 125 and x is the cube root of x^3 so we have

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