1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
horsena [70]
3 years ago
10

Choose the correct product of (8x − 4)(8x + 4).

Mathematics
2 answers:
g100num [7]3 years ago
8 0
I did the box method and my answer was 64x2 x_sqaured minus 16

fredd [130]3 years ago
3 0
64x^2+32x -32x-16 64x^2-16<span>
</span>
You might be interested in
It takes a train 60 seconds to completely drive through a bridge of 1260 m, and 90 seconds to completely drive through a tunnel
Olegator [25]

The length of train is 120 meters

The speed of train is 25 meter per second

<u><em>Solution:</em></u>

The speed is given by formula:

speed = \frac{distance}{time}

Given that,

It takes a train 60 seconds to completely drive through a bridge of 1260 m

And 90 seconds to completely drive through a tunnel of 2010 m

Let the length of the train be "x"

<em><u>The total distance travelled by the train across the bridge is given by:</u></em>

total distance = x + 1260 + x = 2x + 1260

[ here we use x + x to represent that train completely drives through bridge ]

The time taken is given as 60 seconds

<em><u>Therefore, the speed is given as:</u></em>

speed = \frac{2x+ 1260}{60}

<em><u>The total distance travelled by the train through the tunnel is given by:</u></em>

total distance = x + 2010 + x = 2x + 2010

The time taken is given as 90 seconds

<em><u>Therefore, the speed is given as:</u></em>

speed = \frac{2x+ 2010}{90}

The speed of the train was the same in both cases.

Equate both speeds

\frac{2x+ 1260}{60} = \frac{2x+ 2010}{90}

\frac{x+630}{30} = \frac{x+1005}{45}

45(x+630) = 30(x+1005)\\\\45x + 28350 = 30x + 30150\\\\45x - 30x = 30150 - 28350\\\\15x = 1800\\\\x = 120

Thus length of train is 120 meters

<em><u>Find the speed of train:</u></em>

speed = \frac{2x+ 1260}{60}\\\\speed = \frac{2(120) + 1260)}{60}\\\\speed = 25

Thus speed of train is 25 meter per second

5 0
3 years ago
What is the value of x, y and z?
sergeinik [125]

Answer:

The value is 25 x 6y

Step-by-step explanation:

8 0
3 years ago
Simplify – 2(7x – 3)
ANTONII [103]

All you need to do here is multiply the outside number by both 7x and -3.

When done correctly it should look like this:

-14x+6

Thats the answer.

7 times 2 gives you 14 but when multiplying mixed signs it turns negative so it would be -14.

negative 3 times negative 2 gives you 6. Both signs are negative, and you would suppose it would turn into a negative but thats only true when both signs are mixed. Both the 3 and the 2 are negative, making the signs the samez giving you positive

<em><u>Dont</u></em><em><u> </u></em><em><u>forget</u></em><em><u> </u></em><em><u>to</u></em><em><u> </u></em><em><u>make</u></em><em><u> </u></em><em><u>this</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>brainliest</u></em><em><u> </u></em><em><u>answer</u></em><em><u> </u></em><em><u>to</u></em><em><u> </u></em><em><u>help</u></em><em><u> </u></em><em><u>those</u></em><em><u> </u></em><em><u>in</u></em><em><u> </u></em><em><u>need</u></em><em><u>.</u></em><em><u> </u></em><em><u>also</u></em><em><u> </u></em><em><u>add</u></em><em><u> </u></em><em><u>a</u></em><em><u> </u></em><em><u>5</u></em><em><u> </u></em><em><u>star</u></em><em><u> </u></em><em><u>and</u></em><em><u> </u></em><em><u>a</u></em><em><u> </u></em><em><u>heart</u></em><em><u>.</u></em><em><u> </u></em><em><u>thanks</u></em><em><u> </u></em><em><u>for</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>support</u></em><em><u> </u></em><em><u>hope</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>helped</u></em><em><u>.</u></em><em><u> </u></em><em><u>have</u></em><em><u> </u></em><em><u>a</u></em><em><u> </u></em><em><u>nice</u></em><em><u> </u></em><em><u>day</u></em>

5 0
2 years ago
Please help with this
Assoli18 [71]

Answer:

the answer is 34567

Step-by-step explanation:

im not lying just to get points

8 0
3 years ago
Which statements are true about the reflections symmetry of a regular heptagon?
lakkis [162]

Answer:

some statements that are true are :

Step-by-step explanation:

it has only 1 line of reflectional symmetry.

a line of symmetry will connect 2 vertices.

a line of symmetry will connect a vertex and a midpoint of an opposite side.

it has 7 fold symmetry.

a line of symmetry will connect the midpoints of 2 opposite sides.

3 0
2 years ago
Other questions:
  • The left and right page numbers of an open book are two consecutive integers whose sum is 557. Find these page numbers.
    9·1 answer
  • How many plastic cubes can fit into the box?
    5·1 answer
  • What is the area of the parallelogram?
    13·1 answer
  • Please help im very confused
    8·1 answer
  • Linda Davis agreed to lend money to Alex Luciano at a special interest rate of ​9% per​ year, on the condition that he borrow en
    7·1 answer
  • Question 5
    5·1 answer
  • JfdxaMXDCJINCIZSCKZDXVSJOISACXKISZPIAnhCPKISZJCPKNSPKCN KPZSA
    6·2 answers
  • Literal Equations:
    7·1 answer
  • 1. If the spinner below is spun once, find the <br> probability of a number less than 10
    10·1 answer
  • A circle with a radius of 9 millimeters.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!