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Leviafan [203]
3 years ago
7

Write an expression for each of these expressions:

Mathematics
1 answer:
Kipish [7]3 years ago
7 0

Answer:

A. 36  ÷ a

B. 55 - b

C. 18 + c

D. 49 · d

E. e ÷ 62

F. f - 71

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5(2x − 8) = 90<br> thanks
tensa zangetsu [6.8K]
5(2x-8)=90
10x-40=90
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10x=130
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and the answer Is x=13
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Dahlia mandujano uses 250 meters of fabric to create 16 purses.At this rate how many meters far fabric are needed to make one pu
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Answer:

The answer is 16.625

Step-by-step explanation:

We need to divide 250 by 16 to know how much fabric is used to make 1 purse

(I do not know if this is correct, It's almost 2 am so I am very tired)

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Can anyone give a step-by-step guide on how to answer these types of questions? I'm really struggling with similar shapes so tha
Dafna11 [192]

Answer:

a) 8cm

b) 19.8cm

Step-by-step explanation:

The key to these types of questions is to keep proportions in mind.

To solve the first question, you want to find the proportion of the smaller triangle to the bigger triangle. The length of AE is 6cm, but the length of AD is (6+4) = 10cm. So the proportion of the bigger triangle to the smaller triangle is 10/6. So to find the lengths of the sides of the bigger triangle, we want to keep this number in mind.

The BE side is parallel to CD, so we have to use length of BE multiplied by the proportion in order to get the length of CD.

CD = 4.8 * (10/6) = 8

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For the second question, you use the same concept to find all the other side lengths. The only one you need left for the shape EBCD is side BC. Do the same thing you did before, take the length of the side of the smaller triangle that corresponds with side AC on the bigger triangle. In this case, it's AB, which is 4.5cm. Multiply this by 10/6 to get AC.

AC = 4.5 * (10/6) = 7.5

AC = 7.5

But we're not done. We just found the length of AC, but we need the length of BC to calculate the perimeter. To do this, we want to take the length of AC - the length of AB.

7.5 - 4.5 = 3

So the length of BC is 3cm. Now, to find the perimeter, just add all the sides of EBCD together.

4.8 + 4 + 8 + 3 = 19.8cm.

Hope this helps.

8 0
2 years ago
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A user returned a tablet because of its battery life. Find the probability that it was returned after a year.
AysviL [449]

Answer:1/6

Step-by-step explanation:

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