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Zepler [3.9K]
3 years ago
15

99 POINTS What is the equation of the line graphed?

Mathematics
2 answers:
Maurinko [17]3 years ago
8 0

Answer:

y = 3x-2

Step-by-step explanation:

We have the y intercept  (where it crosses the y axis)

It crosses at y=-2

(0,-2)  We need another point to find the slope.

Another point is (1,1)

The formula for slope is

m=(y2-y1)/ (x2-x1)

We have 2 points (0,-2) and (1,1)

   = (1--2)/(1-0)

   = (1+2)/(1-0)

    3/1

m=3

The slope is 3 and the y intercept is -2

We can use the slope intercept form of the equation

y= mx+b where m is the slope and b is the y intercept

y = 3x-2

rjkz [21]3 years ago
3 0

Answer:

y = 3x - 2

Step-by-step explanation:

Two of the coordinates are (2, 4) and (1, 1). The slope of these is 3/1, or 3. Plug this back in to get that the slope-intercept form is y = 3x - 2.

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Olivia is making scarves. Each scarf will have 5 rectangles, and 2/5 of the rectangles will be purple. How many purple rectangle
elena-s [515]
Just add 2/5+2/5+2/5.

Add: 2       2        2  ----- numerators
       ---- + ---- + ----- =?                                                     
        5        5       5   ------- denominators

Add your numerators first: 2+2+2=6 

Leave your denominators alone they are all 5 so that's ok.

Your answer will be 6
                              ------
                                 5

Hope I helped:)
7 0
3 years ago
F your car gets 2424 miles per​ gallon, how much does it cost to drive 370370 miles when gasoline costs ​$3.203.20 per​ gallon?
TiliK225 [7]
$351,912.62 would be the cost
4 0
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Lia finds a second dress that was originally $72.00 and now was marked 15% off. How much did she pay for the second dress?
dybincka [34]

Answer:

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Step-by-step explanation:

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4 0
3 years ago
How do I write 7 23/40 as a decimal
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3 years ago
Find the exact value by using a half-angle identity. sin(5pi/12)
anzhelika [568]

Find <span>tan<span>(<span><span>5π</span>12</span>)</span></span> and sin ((5pi)/12)
Answer: <span>±<span>(2±<span>√3</span>)</span>and±<span><span>√<span>2+<span>√3</span></span></span>2</span></span>

Explanation:

Call tan ((5pi/12) = t. 
Use trig identity: <span><span>tan2</span>a=<span><span>2<span>tana</span></span><span>1−<span><span>tan2</span>a</span></span></span></span>
<span><span>tan<span>(<span><span>10π</span>12</span>)</span></span>=<span>tan<span>(<span><span>5π</span>6</span>)</span></span>=−<span>1<span>√3</span></span>=<span><span>2t</span><span>1−<span>t2</span></span></span></span>
<span><span>t2</span>−2<span>√3</span>t−1=0</span>

<span>D=<span>d2</span>=<span>b2</span>−4ac=12+4=16</span>--> <span>d=±4</span>

<span>t=<span>tan<span>(<span><span>5π</span>12</span>)</span></span>=<span><span>2<span>√3</span></span>2</span>±<span>42</span>=2±<span>√3</span></span>

Call <span><span>sin<span>(<span><span>5π</span>12</span>)</span></span>=<span>siny</span></span>
Use trig identity: <span><span>cos2</span>a=1−2<span><span>sin2</span>a</span></span>
<span><span>cos<span>(<span><span>10π</span>12</span>)</span></span>=<span>cos<span>(<span><span>5π</span>6</span>)</span></span>=<span><span>−<span>√3</span></span>2</span>=1−2<span><span>sin2</span>y</span></span>
<span><span><span>sin2</span>y</span>=<span><span>2+<span>√3</span></span>4</span></span>
<span><span>siny</span>=<span>sin<span>(<span><span>5π</span>12</span>)</span></span>=±<span><span><span>√<span>2+<span>√3</span></span></span>2</span></span></span>

5 0
3 years ago
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