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ELEN [110]
4 years ago
12

-9c --12 +3c =12 what does c=

Mathematics
1 answer:
Ivan4 years ago
4 0
-9c-12+3c=12
-9c+3c=+12+12
-6=+24
c= - 4
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Yes it would be a good tip:)
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3 years ago
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If i sold 3 small boxes of oranges and 14 large boxes of oranges for total of $183. how much are the small and large box
Liono4ka [1.6K]
X = small boxes and y = large boxes

x + y = 17.....x = 17 - y
3x + 14y = 183

3(17 - y) + 14y = 183
51 - 3y + 14y = 183
-3y + 14y = 183 - 51
11y = 132
y = 132/11
y = 12 <=== large boxes (y) cost $ 12

x + y = 17
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8 0
4 years ago
Write the standard equation of a circle with center (−9, −4) and radius calculator
Savatey [412]
(x+9)^2+(y+4)^2=0
Because the radius is not given.
3 0
4 years ago
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Write 54 + 63 as the product of the GCF of 54 and 63 and another sum
levacccp [35]

Answer:

9*(6+7)

Step-by-step explanation:

First, we have to find the Greatest Common Factor (GCF), to do this we have to see all the factors of 54 and 63 and find the greatest factor that they have in common.

Factors of 54

1,2,3,6,9,18,27,54

Factors of 63

1,3,7,9,21,63

The GCF is 9 because is the greatest factor that is common to both numbers.

Now we have to divide 54/9 and 63/9

54/9 = 6

63/9 = 7

So now we can write the product of the GCF and another sum:

9*(6+7)

<em>We can prove this by solving both expressions:</em>

<em>54+63 = 9*(6+7)</em>

<em>117 = 9*13</em>

<em>117 = 117 </em>

<em>The results are equal so we prove it is right.</em>

8 0
3 years ago
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Find the angle between the given vectors to the nearest tenth of a degree.
saul85 [17]

Answer:

A

Step-by-step explanation:

Given

u = <6, -1>

u = 6i-j

and

v=<7,-4>

v=7i-4j

The formula for angle is:

Let x be the angle

cos\ x = \frac{u.v}{||u||.||v||}

where ||u|| is the length and u.v is the dot product or scalar product of both vectors

So,

||u|| = \sqrt{(6)^2+(-1)^2}\\ = \sqrt{36+1}\\ = \sqrt{37}\\ ||v||=\sqrt{(7)^2+(-4)^2}\\ = \sqrt{49+16}\\ = \sqrt{65}\\

u.v = u_1u_2+v_1v_2\\= (6)(7)+(-1)(-4)\\=42+4\\=46

cos\ x=\frac{46}{\sqrt{37}\sqrt{65}} \\= \frac{46}{\sqrt{2405} }\\Can\ also\ be\ written\ as:\\= \frac{46}{\sqrt{2405} } * \frac{\sqrt{2405} }{\sqrt{2405}} \\=\frac{46\sqrt{2405} }{2405}

The calculated angle will be in radians. To find the angle in degrees:

x = \frac{180}{\pi} cos^{-1} (\frac{46\sqrt{2405} }{2405})\\x = 20.282\\x= 20.3\\

Hence Option A is correct ..

6 0
4 years ago
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