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3 years ago

Which rule about the sign of the quotient of positive and negative decimals is correct?

Mathematics

1 answer:

algol133 years ago

8 0

Answer:

Step-by-step explanation:

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In the equation left parenthesis x squared plus 14 x right parenthesis plus left parenthesis y squared minus 18 y right parenthe

Phoenix [80]

Answer:

Complete the square on x by adding 49 to both sides.

Complete the square on y by adding 81 to both sides.

Step-by-step explanation:

We have been given an equation $(x^2+14x)+(y^2+18y)=5$ . We are asked to complete the squares for both x and y.

We know to complete a square, we add the half the square of coefficient of x or y term.

Upon looking at our given equation, we can see that coefficient of x is 14 and coefficient of y is 18.

$(\frac{14}{2})^2=7^2=49$

$(\frac{18}{2})^2=9^2=81$

Now, we will add 49 to complete the x term square and 81 to complete y term square on both sides of our given equation as:

$(x^2+14x+49)+(y^2+18y+81)=5+49+81$

Applying the perfect square formula $a^2+2ab+b^2=(a+b)^2$ , we will get:

$(x+7)^2+(y+9)^2=135$

Therefore, We can complete the square on x by adding 49 to both sides and the square on y by adding 81 to both sides.

7 0

3 years ago

Find the indicated side of the right triangle 60° 7 30° х X= = [?] )

RSB [31]

Answer:

2《6

Step-by-step explanation:

7Tan60°= 12

X= 12 cm

In Surds form= 2《6

I can't find the root sign on my keyboard hence I have replaced it with the arrows before 6

hope I was helpful

7 0

3 years ago

Read 2 more answers

Fourteen more than a number is eighteen.

AVprozaik [17]

Answer: 4

Step-by-step explanation:

18-14=4

3 0

4 years ago

The _______ position of a decimal is two numbers to the right of decimal point.

Olegator [25]

B. Hundredths

It goes tenths, hundredths, thousandths

4 0

4 years ago

Read 2 more answers

Number?What igest ounded to the nearest who

Reptile [31]

Look at it on the Internet

7 0

3 years ago