A $280 suit is marked down by 20%. Find the sale price.

Mathematics

2 answers:

GarryVolchara [31]3 years ago

7 0

Answer:4

Step-by-step explanation:

Ex (increase, such as taxes or price hike):

I want to increase $5 by 20%.

That means I would have to find the product of $5 and 120%.

$5*1.20=6

If you increase $5 by 20%, you will get $6.

Ex (decrease, such as a discount or a special deal):

I want to decrease $5 by 20%.

That means I would have to find the product of $5 and 80%.

$5*.80=4

If you decrease $5 by 20%, you will get 4.

soldi70 [24.7K]3 years ago

7 0

The easiest way of calculating discount is, in this case, to multiply the normal price $280 by 20 then divide it by one hundred. So, the discount is equal to $56. To calculate the sales price, simply deduct the discount of $56 from the original price $280 then get $224 as the sales price.

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In ∆ABC the angle bisectors drawn from vertices A and B intersect at point D. Find m∠ADB if: m∠C=γ

mylen [45]

Answer:

∠ADB = γ/2 +90°

Step-by-step explanation:

Here's one way to show the measure of ∠ADB.

∠ADB = 180° - (α + β) . . . . . sum of angles in ΔABD

∠ADB + (2α +β) + γ + (2β +α) = 360° . . . . . sum of angles in DXCY

Substituting for (α + β) in the second equation, we get ...

∠ADB + 3(180° - ∠ADB) + γ = 360°

180° + γ = 2(∠ADB) . . . . . . add 2(∠ADB)-360°

∠ADB = γ/2 + 90° . . . . . . . divide by 2

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To find angles CXD and CYD, we observe that these are exterior angles to triangles AXB and AYB, respectively. As such, those angles are equal to the sum of the remote interior angles, taking into account that AY and BX are angle bisectors.