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3 years ago

What is 9x+3=21 What is the value of x=

Mathematics

2 answers:

natta225 [31]3 years ago

6 0

Answer:

x=2

Step-by-step explanation:

9x+3=21

9x-3=21-3

9x=18

9x/9=18/9

8=2

valentinak56 [21]3 years ago

4 0

Answer:

Step-by-step explanation:

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3 years ago

- 3 ( n + 5 ) = 12

scZoUnD [109]

Answer:the 1st one is N=17

THE SECOND ONE IS X=35

Step-by-step explanation:

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3 years ago

A rental car company charges a base fee of $36.94 plus $0.60 per mile driven. If x represents the number of miles driven, which

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3 years ago

Determine the equation of the circle graphed below. ( please help me )

Brums [2.3K]

Answer:

$Equation : \\(x+3)^2 + ( y -2)^2 = 36$

Step-by-step explanation:

For standard form the circle's equation we need the centre of the circle and the radius.

Step 1: Find the centre

If the centre is not given find the end points of the diameter

and then find the mid point.

Let the end points of the diameter be : ( - 3 , 8 ) and ( -3 , -4 )

The mid-point of the diameter is :

$Mid-point = (\frac{-3 + - 3}{2}, \frac{-4+8}{2}) = (-3, 2)$

Therefore, centre of the circle = ( -3 , 2 )

Step 2 : Find radius

$Radius = \frac{Diameter }{2}$

Diameter is the distance between the end points ( -3 , 8) and ( -3 , -4 )

That is ,

$Diameter = \sqrt{(-3-(-3))^2 + ( -4 -8)^2}\\$

$= \sqrt{(-3 + 3)^2 + (-12)^2}\\\\=\sqrt{0 + 144}\\\\=12$

Therefore ,

$Radius = \frac{12}{2} = 6$

Step 3 : Equation of the circle

Standard equation of the circle with centre ( h ,k )

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$(x - h)^2+(y -k)^2 = r^2$

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3 years ago

Which of the following is equal to 20x + 8y - 80?

Andrews [41]

It would be C because if you take out the four, the coefficients are multiples of 4 so it simplifies down.

5 0

3 years ago

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