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labwork [276]
3 years ago
9

Select the correct answer. What are the roots of this quartaic equation? -x^2+12x-9=0

Mathematics
1 answer:
NNADVOKAT [17]3 years ago
3 0

Answer:

Step-by-step explanation:

x= 6±3\sqrt{3}

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all missing assignments are due today and I head help!!!! how many solutions are in y=-4/9x-3 Y=-7/5x-3
fiasKO [112]

Answer

Where is the picture

Step-by-step explanation:

4 0
3 years ago
Suppose that 5 people sitting in a enclosed room are each generating about 500 BTUs of body heat per hour. If the room is 10 ft
Mazyrski [523]

Answer:

A)5

Step-by-step explanation:

I answered the question already.

4 0
3 years ago
Read 2 more answers
.A square field has a side 30m. Find the cost of fencing its four sides at Rs. 10 per metre​
Ratling [72]

Answer:

1,200

Step-by-step explanation:

So first we need to find the perimeter

P=30+30+30+30\\\\P=120

so it costs 10 per meter

120\times 10=1,200

7 0
3 years ago
you are allowed to work a total of no more than 30 hours each week at your two jobs. Lawn mowing pays $5 per hour and babysittin
timama [110]

Answer:

5X + 8Y >= 300;    intersection at  (-20, 50)

Step-by-step explanation:

let t = work hours

0 < t < 30

X = time lawn mowing

Y = time babysitting.

X + Y < 30

5X + 8Y >= 300

We could solve...

X < 30 - Y

5(30 - Y) + 8Y  >=300

150 - 5Y + 8Y >= 300

3Y >=150

Y >=50

then  X < -20  

intersection at  (-20, 50)

4 0
3 years ago
Read 2 more answers
Write the equation of the line in fully simplified slope-intercept form.
Bad White [126]

Answer:

y = -\frac{2}{5} x-6

Step-by-step explanation:

1) First, find the slope of the line. Use the slope formula m =\frac{y_2-y_1}{x_2-x_1}. Pick two points on the line and substitute their x and y values into the formula, then solve. I used the points (-5,-4) and (0,-6):

m = \frac{(-6)-(-4)}{(0)-(-5)} \\m = \frac{-6+4}{0+5} \\m = \frac{-2}{5} \\  

So, the slope of the line is -\frac{2}{5}.

2) Next, use the point-slope formula y-y_1 = m (x-x_1) to write the equation of the line in point-slope form. (From there, we can convert it to slope-intercept form.) Substitute values for the m, x_1 and y_1 into the formula.

Since m represents the slope, substitute -\frac{2}{5}  in its place. Since x_1 and y_1 represent the x and y values of one point on the line, pick any point on the line (any one is fine, it will equal the same thing at the end) and substitute its x and y values in those places. (I chose (0,-6), as seen below.) Then, with the resulting equation, isolate y to put the equation in slope-intercept form:

y-(-6) = -\frac{2}{5} (x-(0))\\y + 6 = -\frac{2}{5} x\\y = -\frac{2}{5} x-6

6 0
3 years ago
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