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Setler79 [48]
3 years ago
12

Combine the like terms in this expression: –3x + 2xy + 4y – xy + 2x – 11y A. 2xy + 15 B. –7xy C. –X+XY–7y D. 23X + y

Mathematics
1 answer:
s344n2d4d5 [400]3 years ago
7 0

Answer:

The correct option is C) –x + xy – 7y.

Step-by-step explanation:

Consider the provided expression.

Rearrange the expression so, that like terms comes together.

–3x + 2x + 2xy – xy + 4y – 11y

Now, add the like terms as shown below:

x(–3 + 2) + xy(2 – 1) + y(4 – 11)

Now, perform the operation inside the parentheses.

x(–1) + xy(1) + y(–7)

Open the parentheses.

–x + xy –7y

Now, compare with the provided options.

By comparison it can be concluded that the correct option is C).

Hence, the correct option is C) –x + xy – 7y.

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Answer:

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Step-by-step explanation:

The formula for the area of a circle is :  \p*radius^2

To work out the length of the radius you would first need to divide the area of  78.5 cm by pi (pi=3.14), this gives you 25cm^2\\. This is because by dividing the area by pi we are isolating the value of the radius squared.

The final step is to work out the radius. You can do this by finding the square root of the radius squared which is 25, this gives you 5 cm. This means that the radius is 5 cm. This is because the square root is a number that when squared equals that number.

1) Divide 78.5 by pi.

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2) Find the square root of 25 cm squared.

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Step-by-step explanation:

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