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lozanna [386]
4 years ago
14

4xsquared-3xy+9ysquared-3 (5xy+7ysquared)

Mathematics
1 answer:
Flauer [41]4 years ago
7 0
4x² - 3xy + 9y² - 3(5xy + 7y²)
4x² - 3xy + 9y² - 3(5xy) - 3(7y²)
4x² - 3xy + 9y² - 15xy - 21y²
4x² - 3xy - 15xy + 9y² - 21y²
4x² - 18xy - 12y²
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What is a common denominator for 1/4 and 5/6
levacccp [35]
The lowest common denominator of 1/4 and 5/6 is 12
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4 years ago
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starting from 1.4 miles away a car drives towards a speed check point and then passes it the car travels at a constant rate of 5
LenKa [72]

Answer: At t=0.015 hours when the car 0.6 miles from the check point.

Step-by-step explanation:

Since we have given that

Distance traveled by him towards a speed check point = 1.4 miles

Speed at which he is travelling = 52 miles per hour

Let the time taken by him be x

Since we have the equation

d=1.4-52t

where<em> </em><em>d</em><em> </em>denotes distance

and <em>t </em>denotes time.

If we have given that the car 0.6 miles from the check point.

So, we put the value of <em>d</em> in place of it .

0.6=1.4-52t\\\\0.6-1.4=-52t\\\\-0.8=-52t\\\\0.8=52t\\\\\frac{0.8}{52}=t\\\\0.015=t

So, at t=0.015 hours when the car 0.6 miles from the check point.

5 0
4 years ago
Need help pleaseee i have a test on friday
larisa [96]

Answer:

x = 8

Step-by-step explanation:

Using the sine or cosine ratio in the right triangle and the exact value

sin30° = \frac{1}{2} , then

sin30° = \frac{opposite}{hypotenuse} = \frac{4}{x} = \frac{1}{2} ( cross- multiply )

x = 8

5 0
3 years ago
Identify the values that create ordered pairs that are a solution to the equation 3x-5y=20
viktelen [127]

3x-5y=20 the answer is y= 4x+-1/3

6 0
3 years ago
Find the perimeter of the following rectilinear figure.
Elodia [21]

Can you please add a link to the question so I can see the image?

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3 years ago
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