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Doss [256]
3 years ago
8

If 12 shirts and a dress cost $450 and a dress costs the same as 3 shirts, then how much does a dress cost?

Mathematics
1 answer:
Dovator [93]3 years ago
8 0

First, let's identify some variables:

d = dress price

s = shirt price

d = 3s

12s + d = 450

Because d = 3s, we can substitute the variable:

12s + 3s = 450

15s = 450

s = 30

The shirt costs $30, and the dress $10

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3 years ago
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Sav [38]

Answer:

x = -2.5

Step-by-step explanation:

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Step 3: Check

<em>Plug in x to verify if it's a solution.</em>

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3 years ago
Plz solve i beg i really need help i beg u guys
Dmitry_Shevchenko [17]

check the picture below.


if ∡F = 90° and ∡D = 30°, then the ∡A = 60°, meaning the triangle is a 30-60-90 triangle and therefore we can use the 30-60-90 rule as  you see in the picture.


\bf \textit{area of a triangle}\\\\&#10;A=\cfrac{1}{2}bh~~&#10;\begin{cases}&#10;b=base\\&#10;h=height\\[-0.5em]&#10;\hrulefill\\&#10;h=7\sqrt{3}\\&#10;b=7&#10;\end{cases}\implies A=\cfrac{1}{2}(7)(7\sqrt{3})&#10;\\\\\\&#10;A=\cfrac{49\sqrt{3}}{2}\implies A\approx 42.43524478543749369142

4 0
3 years ago
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