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spin [16.1K]
3 years ago
5

Can you solve this?

Mathematics
1 answer:
marusya05 [52]3 years ago
5 0

Answer:

D

Step-by-step explanation:

The area (A) of a trapezoid is calculated as

A = 0.5h(a + b)

where h is the perpendicular height and a, b the parallel sides.

Given A = 120, then

0.5 × 8(a + b) = 120, that is

4(a + b) = 120 ( divide both sides by 4 )

a + b = 30 cm → D

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Find a number you can multiply by the bottom of the fraction to make it 10, 100, or 1000 and multiple both top and bottom by that number then write down just the top number putting the decimal point in the correct spot.
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3 years ago
Devaughn's age is three times Sydney's age. The sum of their ages is <br> . What is Sydney's age?
g100num [7]

Answer:

syd is 23 and dev is 69


Step-by-step explanation:

Let Dev's age be x and Syd's age be y

Since Dev is 3 times older than Syd, we may write  

x

=

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Since the sum of their ages is 92, we may write  

x

+

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Now replacing x with 3y, we get :  

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=

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Back substituting we get Dev is 69 years old.

8 0
3 years ago
Read 2 more answers
At 1 p.m., the number of cars in a parking lot is 78. Given the formula found in the first part of the question, An=78⋅1.09n, es
Harrizon [31]

Answer:

At 6 p.m., the number of cars in a parking lot is 120

Step-by-step explanation:

At 1 p.m., the number of cars in a parking lot is 78.

Given,

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Note that

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So, 1 p.m. goes for n = 0, then

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Thus,

A_5=78\cdot 1.09^5\approx 120

4 0
3 years ago
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Hope this helps. Let me know if you have more questions.

4 0
3 years ago
Find the volume of the given prism. Round to the nearest tenth if necessary.
Alisiya [41]
Hello!

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h is height
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4.2 * 5.3 * 12.1 = 269.346

The answer is 269.3 cubic centimeters

Hope this helps!
6 0
3 years ago
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