3 years ago

Find the axis of symmetry of the graph of the function. f(x) = 2x^2 - 4x - 1

Mathematics

1 answer:

Tanya [424]3 years ago

4 0

The axis of symmetry formula is
-b/2a. So -(-4)/2*2. 4/4 = 1. So the axis of symmetry is x=1. Hope this helps!

You might be interested in

A fence is 4 feet tall. The fence has a shadow that is 5 feet long. Paul is 6 feet tall, and he is standing next to the fence. U

adoni [48]

Answer:

7.5 feet

Step-by-step explanation:

4/5=6/x

cross multiply

4x=30

x=7.5

5 0

2 years ago

Read 2 more answers

If an author wanted to inform readers about the different types of advertisements, how would this shape his essay’s content and

qaws [65]

Answer:

a He would take an explanatory tone with readers to reveal the different categories of advertisements

Step-by-step explanation:

a is formal and is the best tone for the paper

8 0

2 years ago

16x^7 - 8x^3 / 4x^3

Sunny_sXe [5.5K]

Answer:

4x^4-2

Step-by-step explanation:

$\dfrac{16x^7-8x^3}{4x^3}= \\\\\\\dfrac{4x^3(4x^4-2)}{4x^3}= \\\\\\4x^4-2$

Hope this helps!

8 0

3 years ago

Read 2 more answers

Candice spent 5 1/4 hours doing her homework. Her brother, Ronald, spent 1/2 that number of hours doing his homework. How many h

Elden [556K]

Let

x-----> the number of hours that Candice spent doing her homework

y-----> the number of hours that Ronald spent doing his homework

we know that

$x=5\frac{1}{4}\ hours$

convert mixed number to an improper fraction

$5\frac{1}{4}\ hours=\frac{5*4+1}{4}= \frac{21}{4}\ hours$

$x=\frac{21}{4}\ hours$ -------> equation A

$y=\frac{1}{2}x$ ------> equation B

Substitute equation A in equation B

$y=\frac{1}{2}*\frac{21}{4}=\frac{21}{8}\ hours$

convert an improper fraction to a mixed number

$\frac{21}{8}\ hours=2.625=2+0.625=2+\frac{5}{8}=2\frac{5}{8}\ hours$

therefore

<u>the answer is the option B</u>

$2\frac{5}{8}\ hours$

5 0

2 years ago

Read 2 more answers

Another sigma notation question. Please check. Hopefully I did this one correctly!

Neko [114]

Answer:

Your answer is correct. The series is a geometric series with common ratio -1/4 and first term 40. So each term is:

an = 40 (-1/4)^(n−1)

So the sum of the first 10 terms is:

∑(n=1 to 10) [ 40 (-1/4)^(n−1) ]

8 0

2 years ago