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3 years ago

If you answer these 2 questions,, I will give you 5 stars, 1 thanks, and 25 points :)

Mathematics

1 answer:

Mashcka [7]3 years ago

7 0

Answer:

1) $361.25

2) $280

Step-by-step explanation:

1) $425 * 0.85 = $361.25

If you purchase something that is 25% off then you would only be paying 85% of the cost. 85% in decimal form is 0.85

2) $350 * 0.80 = $280

Similarly, 20% off means you pay 80% of the cost. 80% in decimal form is 0.80

Hope this helps! Please mark brainliest! Have a great day!

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Find the area of an octagon whose perimeter is 120 cm.

stira [4]

Answer:

The area of an octagon whose perimeter is 120 cm is 1086.4 $cm^{2}$

Step-by-step explanation:

An octagon is a polygon with eight sides. If the lengths of all the sides and the measurement of all the angles are equal, the octagon is called a regular octagon.

There is a predefined set of formulas for the calculation of perimeter, and area of a regular octagon.

The perimeter of an Octagon is given by

$P=8a$

and the area of an Octagon is given by

$A=2a^{2}(1+\sqrt{2})$

We know that the perimeter is 120 cm, solving for side length (a) in the perimeter formula we get

$120=8a\\\frac{8a}{8}=\frac{120}{8}\\a=15$

Now, we calculate the area

$A=2a^{2}(1+\sqrt{2})\\A=2(15)^{2}(1+\sqrt{2})\\A=450\left(1+\sqrt{2}\right)\\A\approx 1086.4 \:cm^{2}$

5 0

3 years ago

Two factory plants are making TV panels. Yesterday, Plant A produced 6000 panels. Seven percent of the panels from Plant A and 2

azamat

Answer:

1% of 4000 + 4% of B = 2% of (4000 + B)

40 + 0.04*B = 0.02( 4000 + B)

40 + 0.04* B = 80 + 0.02*B

40 + 0.04*B - 80 - 0.02B = 0

0.02*B - 40 = 0

0.02*B = 40

2B = 4000

B = 2000

Step-by-step explanation:

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3 years ago

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elena-14-01-66 [18.8K]

2x2x2x2x2 is 2^5 in standard notation

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Answer:

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Step-by-step explanation:

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