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Aleks04 [339]
3 years ago
13

Given f(x)=2x-8, find f(3)

Mathematics
1 answer:
IgorLugansk [536]3 years ago
6 0
F(3)=2*3-8=-2. 
Hope that helps. 
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Which perfect square equation represents x^2+4x+1=0 by completing the square?
natali 33 [55]
First thing to do is to move the constant over to the other side of the equals sign.  Then we will complete the square on the x terms.  We will take half the linear term, square it, then add it to both sides.  Our linear term is 4.  Half of 4 is 2, and 2 squared is 4. x^2+4x+4=-1+4.  In the process of completing the square we have created a perfect square binomial on the left which is (x+2)^2=3.  A is our answer.
7 0
3 years ago
Please help I’ll mark you as brainliest if correct!!
Alex777 [14]
8^13

The exponent is increasing by 3
7 0
1 year ago
Which set of side lengths is from a right triangle? A- 10,18,24 B- 9,12,15 C- 6,9,14 D- 4,8,10
dangina [55]
<span>the sum of squares of two smaller sides equals the square of the largest side, it's right triangle
</span>
9^2 + 12^2 = 25^2
81 + 144 = 225
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3 0
3 years ago
Solve for n.<br> -6n = -5 - 5n<br> n=
goblinko [34]

1. Simplify both sides

−6n=−5−5n

−6n=−5+−5n

−6n=−5n−5

2. Add 5n to both sides

−6n+5n=−5n−5+5n

−n=−5

3. Divide both sides by -1.

−n /−1 = −5 /−1

n=5

So the variable n, is equal to 5

4 0
3 years ago
How do i solve this equation: 4/5a + 3 = 1/3a - 8
DENIUS [597]
You have to subtract by \frac{1}{3}a on EACH of  the sides you're working with!

\frac{4}{5}a + 3 - \frac{1}{3}a - 8 - \frac{1}{3}a

Which gives us: \frac{7}{15}a + 3 = -8

Now, that we got these steps out of the way, let's subtract 3 from the sides you're working with! 

\frac{7}{15}a  + 3 - 3 \\ = -8 -3

 \frac{7}{15}(a) = -11

We have gotten these  steps out of the way now lets multiply by \frac{15}{7} on your sides because, it is the reciprocal of \frac{7}{15}

So,  \frac{15}{7}( \frac{7}{15}a ) =  \frac{15}{7}  (-11)

Cancel out: \frac{15}{7}( \frac{7}{15} ) because, it equals to:1

\frac{15}{7}(-11) =   \frac{-165}{7}

Therefore, your answer is:  \frac{-165}{7} aka 23\frac{4}{7} 

Good luck on your assignment and enjoy your day

~MeIsKaitlyn:)


5 0
3 years ago
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