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tatyana61 [14]
3 years ago
15

Help solve the following equation: 20.6 + 2.1x = -8.2x

Mathematics
2 answers:
MrRissso [65]3 years ago
5 0
20.6 + 2.1x = -8.2x \\ 2.1x+8.2x=-20.6 \\ 10.3x=-20.6 \\ x=- \frac{20.6}{10.3}  \\ \boxed{x=-2}
Igoryamba3 years ago
4 0
20.6 + 2.1x = -8.2x

20.6=-10.3x

-2=x
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Find the radius of a circle with the equation 2x2+y2-6x+2y-45=0
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2x²+y²-6x+2y-45=0
center:(3/2,-1)
vertex1:(3/2,-1+√202/2)
vertex2:(3/2,-1-√202/2)
focus1:(3/2,-1+√101/2)
focus2:(3/2,-1-√101/2)


I hope this helps!!!!!!!!!!
4 0
3 years ago
Help me please I'm stuck ​
Licemer1 [7]

Answer:

I think its C

Step-by-step explanation:

8 0
2 years ago
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Please help! Will give brainliest!
const2013 [10]
<h3>1.</h3>

The equation in point-slope form:  y - y₁ = m(x - x₁)

slope:  m = -2

point:   (4, -5)   ⇒   x₁ = 4, y₁ = -5

Therefore, the equation of the line in point-slope form:

<h3>y + 5 = -2(x - 4)</h3>

<h3>2.</h3>

The equation in slope-intercept form:   y = mx + b

Parallel lines has the same slope, so:

y = 4x + 2     ⇒    a = 4

If a line passes through the point <em>(x₁, y₁) </em>then the equation y<em>₁</em> = mx<em>₁</em> + b is true.

(4, 6)  ⇒   x₁ = 4, y₁ = 6  

So:   6 = 4·4 + b  ⇒   b = -10

Therefore the equation:  

<h3>y = 4x - 10</h3>

<h3>3.</h3>

a = 3

(-1, 1)  ⇒   x₁ = -1, y₁ = 1  

So:   1 = 3·(-1) + b  ⇒   b = 4

The equation:  

<h3>y = 3x + 4</h3>

<h3>4. </h3>

The product of slopes of perpendicular lines is -1.

2x - 7y = 1    ⇒  7y = -2x + 1   ⇒  y = -²/₇x + ¹/₇

-²/₇×m = -1    ⇒   m = ⁷/₂

(0, -4)  ⇒   x₁ = 0, y₁ = -4  

-4 = ⁷/₂·0 + b   ⇒   b = -4

The equation:

<h3>y = ⁷/₂x - 4</h3>
8 0
2 years ago
What is the algebraic identity of (5x+3x)²
Anestetic [448]

Step-by-step explanation:

(5x+3x)²

(8x)²

8×8=64

x×x=x²

so (8x)² =64x²

7 0
3 years ago
Jayden created a monthly budget based on his net income. If he earns $3,080 each month, how much money can he allocate to eating
NISA [10]

Answer:

$180

Step-by-step explanation:

First, add up all the money already allocated in the categories.

1200+400+300+500+400+25+75=2900

Then, take 3080 subtracted by the total.

3080-2900=180

Don't forget to add the $ sign in the end

6 0
3 years ago
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