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3 years ago

Find the onginal price Discount 20%Sale price $75

Mathematics

2 answers:

Sati [7]3 years ago

6 0

Answer:

Original price: $

Discount percentage:

Results

Discount:

$15.00

Final Price:

$60.00

Step-by-step explanation:

Tcecarenko [31]3 years ago

5 0

I believe in would be 15$ off

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Graciela is working to earn 200$ . she earns 25$ mowing her grandmas lawn and 60$ for a day of housecleaning what decimal repres

luda_lava [24]

25 + 60 = $85. 85/200 and x/100. 100 times 85= 8500. Divide 8500 by 200= 42.5 Hope this helps!

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4 years ago

<img src="https://tex.z-dn.net/?f=Find%20%7D%20%5Csum%20r%5E%7B2%7D%20%5Ccdot%7B%20%7D%5E%7B20%7D%20C_%7Br%7D%5Cend%7Bequation%7

Serggg [28]

I bet the sum you're referring to is supposed to be

$\displaystyle \sum_{r=0}^{20} r^2 \times {}^{20}C_r$

or equivalently,

$\displaystyle \sum_{r=0}^{20} r^2 \binom{20}r$

where $\binom nk = \frac{n!}{k!(n-k)!}$ is the binomial coefficient.

Recall the binomial series,

$(1+x)^\alpha = \displaystyle \sum_{r=0}^\infty \binom\alpha r x^r$

which is valid for |x| < 1. (Note that if r > α, the binomial coefficient is defined to be zero, so there really are only α many terms when α is a whole number.)

Differentiating both sides with respect to x gives

$\alpha (1+x)^{\alpha-1} = \displaystyle \sum_{r=0}^\infty r \binom\alpha r x^{r-1}$

Multiply both sides by some arbitrary x in |x| < 1 :

$\alpha x (1+x)^{\alpha-1} = \displaystyle \sum_{r=0}^\infty r \binom\alpha r x^r$

Repeat:

$\alpha (1+x)^{\alpha-1} + \alpha(\alpha-1) x(1+x)^{\alpha-2} = \displaystyle \sum_{r=0}^\infty r^2 \binom\alpha r x^{r-1}$

$\alpha x (1+x)^{\alpha-1} + \alpha(\alpha-1) x^2 (1+x)^{\alpha-2} = \displaystyle \sum_{r=0}^\infty r^2 \binom\alpha r x^r$

Let α = 20, and let x approach 1 from below. The right side converges to the sum we want, while the left side converges to

$20 \times 2^{19} + 20\times19\times 2^{18} = (20 + 10\times19)\times2^{19} = \boxed{210\times2^{19}}$

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2 years ago

hospital pays $9 for each set of scrubs plus a delivery fee of $13 per order the total cost for the scrub order was $463. how ma

sergey [27]

They ordered 50 sets of scrubs

8 0

3 years ago

Read 2 more answers

Please help, will give 50 points!!

Dmitry_Shevchenko [17]

Answer:

I strongly believe it’s C.

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3 years ago

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Mrs. Smith has only 52.50 to spend at Old Navy. She wants to buy a shirt for Max that costs $39, including tax, and some socks t

Fynjy0 [20]

Answer:

Step-by-step explanation:

Let's find how much money is left if Mrs.Smith buys a shirt.

52.50 - 39 = 13.50

13.50/4.50 = s

s = 3

Hope this helps :)

6 0

3 years ago

Find the onginal price Discount 20%Sale price $75​

Find the onginal price Discount 20%Sale price $75