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hram777 [196]
3 years ago
10

Ten cards numbered 1 through 10 are in a stack.

Mathematics
1 answer:
snow_lady [41]3 years ago
4 0

Answer:

is it 42

Step-by-step explanation:

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HELPPPPPPPPPPPPPPPPPPPPPPPPPPPP! Is 16x^2 - 56x + 49 a perfect square trinomial? How do you know? If it is, factor the expressio
jasenka [17]

No need to fear, thehotdogman93 is here!

The first step is to get rid of those very large numbers. It's going to be very difficult to factor unless we can bring those high numbers down. So lets see if we can factor each term.

So after dividing 49 with every single digit. The only number that divides evenly is 7 and one, and 16 isnt divisible evenly by 7 so that didn't work. Looks like we're gonna have to work with these big numbers.

There is something interesting though about these numbers. 16 and 49 are both perfect squares. 16 is the same as 4^2 and 49 is the same as 7^2. So we can factor the whole trinomial as:

{(4x - 7)}^{2}

If we were to expand this out as:

(4x - 7)(4x - 7)

and multiply it back into the original form. It would match with the expression we started with. The 4's would multiply back into 16x^2 and the 7's would multiply back into 49.

Additionally 4 * -7 is -28, so you can combine two -28x's into the -56x term in the original trinomial.

Thus, the answer is yes you can, and the answer is:

{(4x - 7)}^{2}

6 0
3 years ago
4 cm × 1 1/4 cm<br>pls answer fast<br>​
kenny6666 [7]

Answer:

5 cm

Step-by-step explanation:

Since 1 1/4 is the same thing as 1.25, you can multiply 4 x 1.25 together to get your final answer which is 5 cm.

6 0
3 years ago
Read 2 more answers
What is a 20% tip, if the dinner bill is 123.43? Show your<br> work.
Harrizon [31]

Answer:

24.686

Step-by-step explanation:

20% is 1/5 so you divide by five. 123.43/5 = 24.686

24.686

x        5

----------

       30

     400

   3000

 20000

100000

123430

add decimal

123.430

= 123.43

5 0
3 years ago
Write the expression in standard form. three divided by quantity three minus twelve i.
slega [8]

3/(3 - 12i)

To simplify this, multiply both sides by (3 + 12i)

(3 - 12i)(3 + 12i)

<em><u>Distributive property.</u></em>

3(3 + 12i) - 12i(3 + 12i)

9 + 36i - 36i - 144i^2

<em><u>Simplify.</u></em>

9 - 144i^2

i^2 can be interpreted as -1.

9 + 144

<em><u>Combine like terms.</u></em>

153 is the simplified version of the bottom half of the expression.

Now for the top half.

3(3 + 12i)

<em><u>Distributive property.</u></em>

9 + 36i

We can simplify this further by factoring.

3(3 + 12i)/153

1 + 4i/17

1/17 + 4i/17 is the simplified version of the expression. (This is your answer.)

Let me know if you have any other questions.

4 0
3 years ago
Mrs Tay baked 45 cookies. She gave 5/9 of them to her friends. How many cookies did she give her friends?​
DerKrebs [107]
25 cookies. Hope this helps.
4 0
3 years ago
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