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Veronika [31]
3 years ago
5

Solve the equation. 2x^2+7=15x

Mathematics
1 answer:
77julia77 [94]3 years ago
3 0
2x^2+7=15x \\
2x^2-15x+7=0\\
2x^2-x-14x+7=0\\
x(2x-1)-7(2x-1)=0\\
(x-7)(2x-1)=0\\
x=7 \vee x=\frac{1}{2}

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What's the gcf of 15 and 4
garri49 [273]
Gcf of 15 and 4 is 1
5 0
3 years ago
The area of a field shaped like a right triangle is 750yd^2.One leg of the field is fenced with wood costing $5/yd. the remainde
Elenna [48]
Assume that
 a and b = the two legs of the right triangle. 
 c =  the hypotenuse.

The area of the right triangle is 750 yd², therefore
(1/2)*a*b = 750
ab = 1500               (1)

The perimeter is 150yd, therefore
a + b + c = 150         (2)

Let the side fenced with wood be a, at $5/yd.  Sides b and c are fenced with steel at $10/y. The total cost is $1200, therefore
 5a + 10b + 10c = 1200            
or
a + 2b + 2c = 240         (3)

From (2), obtain 
c = 150 - a - b              (4)

Substitute (4) into (3)
a + 2b + 2(150 - a - b) = 240
-a + 300 = 240
a = 60

From (1), obtain
60b = 1500
b = 25

From (4), obtain
c = 150 - 60 - 25 = 65

Answer:
A. The length of the leg fenced with wood is 60 yd.
B.  The length of the leg fenced with steel is 25 yd.


5 0
3 years ago
PLEASE FOR 100 POINTS!!! PLEASE!!!
tiny-mole [99]

Answer:

\Large \boxed{\sf 956.56 \ mm^2}

Step-by-step explanation:

Surface area → area of 2 bases + area of 6 rectangles

Area of base is given

Area of rectangle → length × width

\left(2\cdot 166.28\right)+\left(8\cdot 13\cdot 6\right)=956.56

3 0
3 years ago
Read 2 more answers
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Fynjy0 [20]
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3) A line passes through the point (-6, 6) and (-6, 2). In two or more complete sentences, explain why it is not possible to write the equation of the given line in the traditional version of the point-slope form of a line. 

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7) Write the point-slope form of the equation of the line that passes through the points (5, -9) and (-6, 1).
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y + 9 = (-10 / 11) (x - 5)
y = (-10 / 11)x -49/11

</span>
3 0
3 years ago
The fastest a human has ever run is 27 miles per hours. How many miles per minute did the human run?
storchak [24]
They would have ran 0.45 miles per minute. Multiply this by 60 minutes(in which make an hour) and you will get 27 miles.
6 0
3 years ago
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