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kupik [55]
3 years ago
6

How do I factor this:

Mathematics
1 answer:
bija089 [108]3 years ago
8 0

x²+6x²=7x²

then the rest is done for you

7x²+12x+8

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Is this right or wrong ?
Otrada [13]

Answer:

(3x - 2)(4x + 6) = 12 {x}^{2} + 18x - 8x + - 12 \\  = 12 {x}^{2} + 10x - 12

6 0
3 years ago
Find the inverse of the following function<br> f(x)= x+18
klasskru [66]

Answer:

f^-1(x) = x - 18

Step-by-step explanation:

y = x + 18

x = y + 18

x - 18 = y

f^-1(x) = x - 18

6 0
2 years ago
Evaluate 4-2f when f = 1
vladimir1956 [14]
1.. Plug in f... 4 - (2 x 1).
2.. Multiply 2 x 1... 4 - 2
3.. Subtract... 4 - 2 = 2
The answer is 2
6 0
3 years ago
Read 2 more answers
If a car drives for 45 miles per hour, how many minutes will it take if it drives 27 miles?
Darya [45]
20.25 because 1 mile takes 0.75 minutes
5 0
2 years ago
Read 2 more answers
Bethany,Lauren,Amanda,and David all meet at Family reunion. They are comparing their ages. They have found that Laura is 13 year
bazaltina [42]
The second system of equations, 

\left \{ {{y=\frac{x^2}{2}+\frac{13}{2}x} \atop {y=x^2-27x+129}}
is correct.

We know that Bethany's age is x.  Since Laura is 13 years older, her age is x+13.  The product of their ages is equal to twice Amanda's age, and Amanda's age is y.  This gives us:
x(x+13) = 2y

Using the distributive property, we have 
x²+13x=2y

Dividing everything by 2 (to isolate y), we have:
x²/2 + (13/2)x = y

If we take 20 years off of Bethany's age, it is now represented as x-20.  Taking 20 years off of Laura's age would be (x+13-20) or x-7.  The product of their ages now is equal to David's age; David is 11 years older than Amanda, so his age is y+11.  This gives us:

(x-20)(x-7)=y+11

Multiplying the binomials we have:"
x*x - 7*x - 20*x - 20(-7) = y+11
x²-7x-20x--140=y+11
x²-27x+140=y+11

To isolate y, subtract 11 from both sides:
x²-27x+140-11 = y+11-11
x²-27x+129 = y
7 0
3 years ago
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