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Zepler [3.9K]
3 years ago
12

You have a 20 % total purchase coupon . You total is $134.22 if you use the coupon what does your total is $134.22 if you use th

e coupon what does your total come to
Mathematics
1 answer:
Romashka-Z-Leto [24]3 years ago
3 0

Answer:

$107.38

Step-by-step explanation:

 FIRST WAY:

Since you have a 20% discount, that is equivalent to two-tenths of $134.22

 Step 1: find the discount.

   0.2 x 134.22 = 26.844 (round to 26.84)

Now that you have the discount, simply subtract that discount from your original price.

 Step 2: find the final price.

   $134.22 - $26.84 = $107.38

 SECOND WAY:

A faster way to solve problems like this is to find the percentage of cash you are going to pay with the coupon. To do so, simply convert your percentage value to its corresponding decimal value relative to the original.

<em>Layman's terms: just subtract the 20% from 100% to get 80%.</em>

 Step 1: find the percentage to be paid.

   100% - 20% = 80% OR 1 - 0.2 = 0.8

Now that you have the percentage you need to pay, just multiply that percentage by the original amount.

 Step 2: find the final payment.

   $134.22 x 0.8 = $107.38

 

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Find the surface area and volume of the composite figure.
Shalnov [3]

Answer:

The total volume is 33.6 + 107.52 = 141.12

The total surface area is 52 + 22.4 + 76.8 + 26.88 = 178.08

Step-by-step explanation:

Top prism:

To find the volume of the top prism, multiply the area of the base by the height. This is 1/2 times width times height times length.

V =1/2 l*w*h =1/2* 3*2.8*8 = 33.6

To find the surface area of a prism, find the area of the triangular base and the area of each rectangular side.

Area of the base is A = 1/2 * b*h = 1/2 * 3 * 8 = 12. Since there are 2 bases, the area is 24.

Area of the rectangular side is A = b*h = 2.8*5 = 14. Since there are two, the area is 2*14 = 42.

The surface area of the prism is 24 + 28 = 52.

Bottom prism:

To find the volume of the bottom prism, multiply the width times the height times the length.

V = l*w*h = 8*2.8*4.8 = 107.52

To find the surface area of the bottom prism, find the area of the base and each side of the house.

A = 8*2.8 = 22.4

A = 8*4.8 = 38.4 which occurs twice so it has a total area of 76.8

A = 2.8*4.8 = 13.44 which occurs twice so it has an area of 26.88.

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The total surface area is 52 + 22.4 + 76.8 + 26.88 = 178.08

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Use the points given to find the slope.  Divide the difference in y-values by the difference in x-values.

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The slope is 2.

Now, pick one of the points to put in point-slope form.  It doesn't matter which.  You will get the right answer either way.  I will use (-1, -8).

y - y₁ = m(x - x₁)

y - (-8) = 2(x - (-1))

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I would say bottom left

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