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Flura [38]
2 years ago
6

Given one of the roots of the quadratic equation x2 + kx + 12 = 0 is three times the other root. Find the values of k.

Mathematics
1 answer:
gtnhenbr [62]2 years ago
5 0

\huge\bold{\purple{\bold{⚡Kaboom!⚡}}}

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The value of a plot of land is S18 000.00.
Brums [2.3K]

Answer:

$126

Step-by-step explanation:

The plot of land is worth $18,000 and the tax on the land is $0.70 per $100. You would divide 18000 by 100 which is 180. Then you would multiply 180*0.70 which is $126.

7 0
4 years ago
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What is the value of f(7)
kkurt [141]
F(7) means f(x) when x = 7. The x is replaced with 7.

So we'll replace every x with 7 to go from x = 7 to 3-x = 3-7 = -4

Put another way
f(x) = 3-x
f(7) = 3-7
f(7) = -4

Answer: -4
8 0
3 years ago
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If line n bisects CE, find CD. ​
Artist 52 [7]

If it bisect, then using the Line Bisector Theorem, it must be equal.

So x+6=4x-21

get like terms on 1 side

x+6=4x-21

-x. +21

27= 3x

x=9

plug the x in

CD= 9+6

CD=15

8 0
3 years ago
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16.8 is 10% of what number? Someone help TWT
Aloiza [94]

Answer:

168

Step-by-step explanation:

16.8 = 10%

x = 100%

To get to 100%, you have to multiply 10 by ten and 16.8 by 10. Like this:

16.8 = 10%                   original equation

16.8 (10) = 10% (10)      * both sides by 10

168 = 100%                  simplify

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7 0
3 years ago
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Given (x – 7)2 = 36, select the values of x.
Gre4nikov [31]

Answer:

x = 13 and x = 1

Step-by-step explanation:

(x-7)² = 36

simplify left side of equation

x² - 14x + 49 = 36

Our object now is to get every thing on the left side of the equal sign so we can factor. To do this, we subtract 36 from both sides

x² - 14x + 13 = 0

we then factor the left side of the equation

( x - 1 ) ( x - 13 ) = 0

we then set factors equal to 0 and solve both factors for x

x - 1 = 0

add 1 to both sides

x = 1

x - 13 = 0

add 13 to both sides

x = 13

The values of x are x = 13 and x = 1

8 0
3 years ago
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