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polet [3.4K]
3 years ago
14

The price of a dress is reduced by 25​%.When the dress still does not​ sell, it is reduced by 25​% of the reduced price. If the

price of the dress after both reductions is ​$18​, what was the original​ price?The price of a dress is reduced by 25​%.When the dress still does not​ sell, it is reduced by 25​% of the reduced price. If the price of the dress after both reductions is ​$18​, what was the original​ price?
Mathematics
1 answer:
fredd [130]3 years ago
8 0
18= (d - 0.25d) - 0.25d
18= 0.75d - 0.25d
18= 0.50d
d = 36

the original price was $36
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A table is on sale for 65% off. the sale price is $154 . what is the regular price?
Yuliya22 [10]
The original price is $254.10 or 254 rounded. 154 times .65 is 100.1. Add 100.1 to the sale price which is 154 and you'll get the original, 254.
Hope this helps :)
7 0
3 years ago
PLEASE HELP MEEE <br><br> :))
ivanzaharov [21]

Answer:

Question (1) is 5

Step-by-step explanation:

3x3=9

9+1=10

10

— = 5

2

5 0
2 years ago
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Which graph represents a function with a rate of change of 0.5? On a coordinate plane, a line with negative slope goes through p
Law Incorporation [45]

Answer:

C

Step-by-step explanation:

I took the test

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Determine whether or not the vector field is conservative. if it is conservative, find a function f such that f = ∇f. (if the ve
Akimi4 [234]
A three-dimensional vector field is conservative if it is also irrotational, i.e. its curl is \mathbf 0. We have

\nabla\times\mathbf f(x,y,z)=-2e^{-x}\,\mathbf k

so this vector field is not conservative.

- - -

Another way of determining the same result: We want to find a scalar function f(x,y,z) such that its gradient is equal to the given vector field, \mathbf f(x,y,z):

\nabla f(x,y,z)=\mathbf f(x,y,z)

For this to happen, we need to satisfy

\begin{cases}f_x=ye^{-x}\\f_y=e^{-x}\\f_z=2z\end{cases}

From the first equation, integrating with respect to x yields

f_x=ye^{-x}\implies f(x,y,z)=-ye^{-x}+g(y,z)

Note that g *must* be a function of y,z only.

Now differentiate with respect to y and we have

f_y=-e^{-x}+g_y=e^{-x}\implies g_y=2e^{-x}\implies g(y,z)=2ye^{-x}+\cdots

but this contradicts the assumption that g(y,z) is independent of x. So, the scalar potential function does not exist, and therefore the vector field is not conservative.
8 0
3 years ago
If xsquared+ysquared=57 , xy=3 . find the value of 3(x+y)squared
shepuryov [24]

Answer:

189

Step-by-step explanation:

If you mean this, my answer is 3x63= 189

{x}^{2}  +  {y}^{2}  = 57 \\ xy = 3

{x}^{2}  +  {y}^{2}  + 2xy = 57 + 2 \times 3

{(x + y)}^{2}  = 63

3 {(x + y)}^{2}  = 3 \times 63 = 189

6 0
3 years ago
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