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spayn [35]
3 years ago
6

Is y=-9x proportional

Mathematics
2 answers:
Nookie1986 [14]3 years ago
6 0

Answer:

Proportional.

Step-by-step explanation:

We have been given that given an equation y=-9x. We are asked to determine whether the given equation is proportional or not.

We know that two proportional quantities are in form y=kx, where k is constant of proportionality.

We can see that our given equation is in form y=kx, where k=-9.

Therefore, the given equation is directly proportional.

icang [17]3 years ago
3 0
Yes, y=-9x is proportional
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Fill in the other coordinate for the line 7x - 5y = 21: (4, )
garri49 [273]
7x - 5y = 21....(4,?)...so sub in 4 for x and solve for y
7(4) - 5y = 21
28 - 5y = 21
-5y = 21 - 28
-5y = - 7
y = 7/5

check..
7(4) - 5(7/5) = 21
28 - 35/5 = 21
28 - 7 = 21
21 = 21 (correct)

the other coordinate is 7/5......(4,7/5)
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2 years ago
Nine negative third power in standard form
Andre45 [30]

Answer:

9^-3=    .0013717421

Step-by-step explanation:

6 0
3 years ago
A rectangle's perimeter is equal to 27 plus its width. The length of the rectangle is four times its width. What is the
lara31 [8.8K]

Answer:

P = 3

Step-by-step explanation:

L = 4*w

P = 27 + w

P = 2*L + 2*w = 27 + w

2L = 2*(4w) = 8w

Put that into the perimeter formula (the first one.)

P = 8w + 2w = 27 + w

10w = 27 + w                        Subtract w from both sides

9w = 27                                Divide by 9

w = 27 / 9                          

w = 3

You should find the Length just so you can check it.

L = 4w

L = 4*3

L = 12

Check

P = 2L + 2w

P = 2*12 + 2*3 = 30

P = 27 + w

P = 27 + 3

P = 30 and everything checks.

8 0
3 years ago
What is the volume of a cylinder with base radius 4 and height 7
stealth61 [152]

Answer:

351.86

Step-by-step explanation:

7 0
3 years ago
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Determine the standard form of the equation of the line that passes through (-5,0) and (0,-9)
bonufazy [111]

Answer:

9x+5y=-45

Step-by-step explanation:

To write the equation of a line we must have a slope and a point. To find the slope we use the slope formula and substitute (x,y) points in it as shown below:

m=\frac{y_2-y_1}{x_2-x_1}=\frac{-9-0}{0--5}=\frac{-9}{0+5}=\frac{-9}{5}=\frac{-9}{5}

Now that we have the slope, plug in the slope and choose one point to plug into the point slope formula. Use the point-slope form to write the equation, then simplify and convert into the slope intercept form.

(y-0)=-9/5(x--5)

y=-9/5(x+5)

y=-9/5x-9

Now convert to standard form, Ax+By=C.

y=-9/5x-9

9/5x+y=-9

9x+5y=-45



5 0
3 years ago
Read 2 more answers
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