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zavuch27 [327]
3 years ago
11

Graph the following lines and using the graph determine several values of x for which the graph is positive (negative): y=−4x+3

Mathematics
1 answer:
True [87]3 years ago
6 0

Answer:


Step-by-step explanation:

Given line is,

y=-4x+3

when, x=-1 , y=-4(-1)+3=4+3=7

when, x=0 , y=-4(0)+3=0+3=3

when, x=1 , y=-4(1)+3=-4+3=-1

So, we got the points  (-1,7) , (0,3) , (1,-1)

Now, putting the points in the graph and adding them , we will get the graph of given line.

Please check image for the graph.


Now for the second part-

The graph is positive means- it will be above the x-axis, that is y value will be positive.

From the graph we can see that, if x<0 , then y is positive.

So, any value of x which is less than 0 , will give the positive graph here.

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Carley has 8 1/2 yards of fabric. She uses 2 1/2 to make pillows and 3 yards to make curtains. How much fabric is remaining
soldier1979 [14.2K]
3 yards of fabric will remain
3 0
3 years ago
The height, h, in feet of a rock above the ground is given by the equation h = -16t^2 + 24t + 16, where t is the time in seconds
boyakko [2]

The rock will hit the ground at 2 seconds.

Explanation:

Given that the height, h, in feet of a rock above the ground is given by the equation h=-16t^2+24t+16, where t is the time in seconds after the rock is thrown.

We need to determine the time at which the rock will hit the ground.

To determine the time, let us equate the height h = 0 in the equation h=-16t^2+24t+16, we get,

0=-16t^2+24t+16

Switch sides, we have,

-16 t^{2}+24 t+16=0

Let us solve the equation using the quadratic formula.

Thus, we have,

t=\frac{-24 \pm \sqrt{24^{2}-4(-16) 16}}{2(-16)}

Simplifying, we get,

t=\frac{-24 \pm \sqrt{576+1024}}{-32}

t=\frac{-24 \pm \sqrt{1600}}{-32}

t=\frac{-24 \pm 40}{-32}

Hence, the two values of t are

t=\frac{-24 + 40}{-32}   and   t=\frac{-24 -40}{-32}

Simplifying the values, we get,

t=\frac{16}{-32}  and  t=\frac{-64}{-32}

Dividing, we get,

t=-\frac{1}{2}  and  t=2

Since, t cannot negative values, we have,

t=2

Thus, the rock will hit the ground at 2 seconds.

8 0
3 years ago
Select the correct solution set. x + 17 ≤ -3
cestrela7 [59]

Answer:

{x | x ≤ -20}

Step-by-step explanation:

x + 17 ≤ -3

Subtract 17 from each side

x + 17-17 ≤ -3-17

x  ≤ -20

7 0
3 years ago
What two numvbets are 7 units away from 0 on a number line
yanalaym [24]
I would guess it would be
7 and -7
5 0
3 years ago
18% is what number of 63?
zvonat [6]

Answer:

18 \%\: of \: x = 63 \\  \frac{18}{100} x = 63 \\ x =  \frac{63 \times 100}{18}  \\ x = 350

<h2><u>350</u> is the right answer.</h2>
5 0
3 years ago
Read 2 more answers
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