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uranmaximum [27]
3 years ago
5

Write an equation for the line shown in the graph

Mathematics
1 answer:
koban [17]3 years ago
7 0

Answer:

y= -x+10

Step-by-step explanation:

ok, so the basic formula is y=mx+b

m=slope and b= the intercept

the line crosses the y-axis at 10, so we know that 10=b. it is a downward going slope, so its negative. the formula for slope is rise/run, or in our case, fall/run. for every 2 it falls, it runs 2. that is -2/2, which can be simplified to -1. looking at the graph , it's hard to comprehend the question at first and it took me multiple times looking at the graph. I hope I helped some!

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X = -2y + 300 3y = 800 - 4x
devlian [24]

Answer:

<h2>x = 140, y = 80</h2>

Step-by-step explanation:

\left\{\begin{array}{ccc}x=-2y+300&(1)\\3y=800-4x&(2)\end{array}\right\\\\\text{Substitute (1) to (2):}\\\\3y=800-4(-2y+300)\qquad\text{use the distributive property:}\ a(b+c)=ab+ac\\\\3y=800+(-4)(-2y)+(-4)(300)\\\\3y=800+8y-1200\\\\3y=8y-400\qquad\text{subtract}\ 8y\ \text{from both sides}\\\\-5y=-400\qquad\text{divide both sides by (-5)}\\\\y=80\\\\\text{Put it to (1):}\\\\x=-2(80)+300\\\\x=-160+300\\\\x=140

8 0
3 years ago
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kkurt [141]

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- 2/3

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2 years ago
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Solve the equation -7x - 9 = 19 x =?
Ann [662]

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Step-by-step explanation:

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2 years ago
Are the lines y = -x - 6 and 3x - 3y = 9 perpendicular? Explain
irakobra [83]

Answer:

the lines are perpendicular

Step-by-step explanation:

if they are perpendicular the products of their gradients would be -1

the gradient of y=-x-6 is -1

the second equation needs to written to conform to y=mx+c

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1x-1=  -1

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