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4 years ago

A dress that normally costs $69.50 is on sale for 45% off. What is the sale price of the dress?

Mathematics

2 answers:

xeze [42]4 years ago

8 0

Answer:

Step-by-step explanation:

The dress costs 45% less than $69.50

45% of $69.50 is $(0.45)(69.50)=31.275$

We subtract 31.275 from 69.50 to get the sale price.

Sale Price = $69.50-31.275=38.225$

Rounding to 2 decimal places, the sale price is $38.23 (answer choice A is right)

tamaranim1 [39]4 years ago

3 0

38.23 hope that helps give 5 stars and thanks if it helps you

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Softa [21]

(-2,0) option b is the correct answer

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3 years ago

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It is a week before the maths festival. A maths exhibitor costs £75.40 and so far 12 have been bought.

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Answer:

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Step-by-step explanation:

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3 years ago

Is -2/3(12b - 6 + 9b - 18) equivalent to 2b(b + 8)? Show your work.

AURORKA [14]

Answer:

No, they are not equivalent

Step-by-step explanation:

$\frac{-2}{3}(12b - 6 + 9b - 18) = \frac{-2}{3}(12b + 9b - 6 - 18)\\\\=\frac{-2}{3}(21b - 24)\\\\ = \frac{-2}{3}*21b -24*\frac{-2}{3}\\\\= -2*7b + 8*2\\\\= 2( -7b + 8)$

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3 years ago

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samantha threw an apple out of a window from the tenth floor of her appartment building. the equation y = -16t^2+120 can be used

ella [17]

Answer:
time taken = 2.74 seconds

Explanation:
We are given that:
y = -16t² + 120 models the situation where:
y is the floor number
t is the time taken for the apple to hit the ground

We are also given that the floor number (y) is 10. Therefore, all we have to do is substitute with y in the above equation and solve for the time t as follows:
y = -16t² + 120
10 = -16t² + 120
120 - 10 = 16t²
110 = 16t²
t² = 110/16
t² = 6.875
either t = 2.74 seconds ..........> accepted
or t = -2.74 seconds .........> rejected as time cannot be in negative

Hope this helps :)

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3 years ago

Find the equation of the line containing the points (0,3) and (1,8)

Tema [17]

Answer:

y = 5x + 3

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

To calculate m use the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, 3) and (x₂, y₂ ) = (1, 8)

m = $\frac{8-3}{1-0}$ = 5

Note the line crosses the y- axis at (0, 3) ⇒ c = 3

y = 5x + 3 ← equation in slope- intercept form

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3 years ago