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3 years ago

Janelle bought a pair of sneakers for $75.65. There was a 15% discount. What was the original price of the sneakers?

Mathematics

2 answers:

lana [24]3 years ago

6 0

Original price 87 dollars

juin [17]3 years ago

5 0

The original price of the sneakers was $87.

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How do you solve this

zaharov [31]

5 × 7,776 - 4 × 9
38,880 - 4 × 9
38,880 - 36
= 38,844

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VMariaS [17]

100000000000000000000000000000000000000000000000001

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3 years ago

Four-fifths of a number<br> decreased by eight is four.<br> Find the number.

Norma-Jean [14]

4/5x-8 = 4
4/5x = 12
X = 15

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4 years ago

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Three less than four times a number is the same as the number +12 what is the equation?

Sladkaya [172]

Answer:

I think it would be 4×n-3 = n+12

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4 years ago

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Which are the solutions of x2 = 19x + 1?

Finger [1]

Answer:

$(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})$

Step-by-step explanation:

we have

$x^2=19x+1$

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-x^{2}-19x-1=0$

$a=1\\b=-19\\c=-1$

substitute in the formula

$x=\frac{-(-19)\pm\sqrt{-19^{2}-4(1)(-1)}} {2(1)}$

$x=\frac{19\pm\sqrt{365}} {2}$

$x=\frac{19+\sqrt{365}} {2}$

$x=\frac{19-\sqrt{365}} {2}$

$(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})$

therefore

StartFraction 19 minus StartRoot 365 EndRoot Over 2 EndFraction comma StartFraction 19 + StartRoot 365 EndRoot Over 2 EndFraction

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3 years ago

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