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2 years ago

Help me please and thank you !

Mathematics

2 answers:

serg [7]2 years ago

7 0

The answer is C. Why? Well, see below!

A would be incorrect because the problem is asking what the area of the stamp would be. In order to find area, we multiply length and width by each other. The given equation we initially had shows division, and would therefore be incorrect. B would be incorrect because although the equation has the correct evaluation symbol, the formula for identifying length would be L = A / W, which means length equals area divided by width. Because the area is 1/4 in this problem, the expression used for evaluation would be 1/4 divided by 1/5. D is incorrect because, like B, the evaluation expression would be 1/4 divided by 1/5.

Your final answer: Because C is the only problem that gives us a corresponding expression to the initial expression, C is the correct answer. If you need extra help, let me know and I will gladly assist you.

olya-2409 [2.1K]2 years ago

6 0

Answer:

Step-by-step explanation:

(A)length of a stamp=1/5foot

wide of a stamp=1/4foot

area of the stamp=?

area of the stamp=length of a stamp *wide of a stamp

=1/5*1/4

=1/20square foot

(B)an area of the room=1/4 square meter

width of the room=1/5meter

length of the room=?

an area of the room=width of the room*length of the room

1/4 =1/5 * length of the room

1/4 = length of the room/5

5/4 =length of the room

<h3>length of the room =5/4=1 1/4</h3>

(C)the area of the canvas=1/5square yard

width of the canvas=1/4 yard

length of the canvas=?

an area of the canvas=width of the canvas*length of the canvas

1/5 = width of the canvas*1/4

1/5 = width of the canvas/4

4/5 =width of the canvas

width of the canvas= 4/5

(D)length of the rectangular course=1/5mile

area of the rectangular course=1/4square mile

width of the rectangular course=?

an area of the rectangular course

width of the rectangular course*length of the rectangular course

1/4 =width of the rectangular course*1/5

1/4 =width of the rectangular course/5

5/4 =width of the rectangular course

width of the rectangular course=5/4

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Two radar stations 5.5 miles apart are tracking an airplane. The straight line distance

Vesnalui [34]

Answer:

19°

Step-by-step explanation:

I have attached an image showing this elevation.

From the image, let's first find the angle A by using cosine rule.

Thus;

8.1² = 5.5² + 13.1² - 2(5.5 × 13.1)cos A

65.61 = 30.25 + 171.61 - 144.1cos A

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3 years ago

A woman earns $ 1,350 in interest from two accounts in one year. If she has three times as much invested at 7% as she does at 6%

VashaNatasha [74]

Answer:

The woman invested $15,000 at 7% interest rate and $5,000 at 6% interest rate.

Step-by-step explanation:

We are given the following in the question:

Let x be the interest earned from 7% interest rate and y be the interest earned from 6% interest rate.

The woman invested has three times as much invested at 7% as she does at 6%.

Thus, we can write the equation:

$x = 3y$

The total interest is $1,350.

Thus, we can write the equation:

$1350 = \dfrac{7x}{100} + \dfrac{6y}{100}\\\\7x + 6y = 135000$

Solving the two equations by substitution method:

$7(3y) + 6y = 135000\\27y = 135000\\y = 5000\\x = 3(5000) = 15000$

Thus, she invested $15,000 at 7% interest rate and $5,000 at 6% interest rate.

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3 years ago

One pump can empty a pool in 4 days, whereas a second pump can empty the pool in 10 days. How long will it take the two pumps, w

gtnhenbr [62]

Answer:

20/7 days (just less than 3 days)

Step-by-step explanation:

Recall that (1 job) = (rate)(time), so time = (1 job) / (rate).

Set up and solve the following equation:

1 job

------------------------------- = time required for 2 pumps working together

1 job 1 job

---------- + -------------

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This comes out to:

1 job

------------------------------------------- = time required

10 job-days 4 job-days

------------------ + -----------------

40 days 40 days

or:

1 job

-------------------- = (40/14) days, or 20/7 days (just less than 3 days)

14 job·days

-----------------

40 days

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3 years ago

How can you explain the answer 4 divided by 5

Sergio [31]

Answer:

4 divided by 5 is equal to 0.8. This decimal can also be written as a fraction. 0.8 = eight tenths or 8/10 (4/5 in its reduced form).

Step-by-step explanation:

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3 years ago

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