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katrin2010 [14]
3 years ago
13

Please help! 4x(5y-x)-5y(4x-y)

Mathematics
2 answers:
Andreas93 [3]3 years ago
8 0
<span>4x(5y-x)-5y(4x-y)=20xy-4x^2-20yx+5y^2=-4x^2+5y^2=5y^2-4x^2</span>
Anvisha [2.4K]3 years ago
6 0
= 4x(5y-x) - 5y(4x-y)
= 20xy-4x²- 20xy+5y²
= -4x²+5y²
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vaieri [72.5K]

{(3x)}^{2}-2(3x)(5)+{5}^{2}

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2

{(3x-5)}^{2}

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3 years ago
Find the value of the variable and DF if D is between C and F if CD 4y -9, DF 2y-7, and CF 14.
Yuri [45]
CF = CD + DF (since D is simply a point on the line, and C to that point added onto F to that point is CF), so 4y-9+2y-7=14. Adding it up, we get 6y-16=14 and adding by 16 we get 30=6y. Dividing both sides by 6, we get y=5. Plugging that into DF, we get 10-7=DF=3
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3 years ago
What is 10x as much as 70?​
sleet_krkn [62]

9514 1404 393

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  700

Step-by-step explanation:

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2 years ago
Which term best describes the definition below?
Amiraneli [1.4K]
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4 0
3 years ago
Solve the following system: y = x 3 4x y = 18 (6, 3) (3, 6) (â’3, 6) (3, â’6).
Nastasia [14]

The solution of the given equation is (3,6). The correct option is B.(3,6)

<h3>Given equations,</h3>

y=x+3.......(1)\\4x+y=18.....(2)

<h3>How to solve the equations?</h3>

putting the value of y from equation (1) in equation (2) , we get

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substitute the value of x=3 in equation (1) we get,

y=3+3\\y=6

Hence, the solution of given equation is (3,6).

So, the correct option is B.

For more details about the system of equations, follow the link:

brainly.com/question/12895249

4 0
2 years ago
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