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ch4aika [34]
3 years ago
14

What is the factored form of x2 + 12x – 64?

Mathematics
1 answer:
Ket [755]3 years ago
6 0

Answer:

The answer is

<h2>( x - 4)( x + 16)</h2>

Step-by-step explanation:

x² + 12x - 64

To factorize the expression write 12x as a difference

That's

x² + 16x - 4x - 64

<u>Factor out x from the expression</u>

That's

x( x + 16) - 4x - 64

<u>Factor out - 4 from the expression</u>

That's

x( x + 16) - 4 ( x + 16)

<u>Factor out (x + 16) from the expression</u>

We have the final answer as

<h3>( x - 4)( x + 16)</h3>

Hope this helps you

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a certain number of two digit is three times the sum of its digit and if 45 added to it the digit will be reversed find the numb
bogdanovich [222]
· Author has 184 answers and 67.6K answer views
Let the number be (10 x + y)

Then, 10 x + y = 3 * (x + y) (given)

Or, 10 x + y = 3 x + 3 y

Or, 10 x - 3 x = 3 y - y

Or, 7x = 2 y

Or, x = 2 y / 7 ( Eq. 1)

Also, 10 x + y + 45 = 10 y + x ( given)

Or, 10 x - x = 10 y - y - 45

Or, 9 x = 9 y - 45 ( Eq. 2)

Substituting the value of x from (Eq. 1) in (Eq. 2), we have:

9 * 2 y / 7 = 9 y - 45

Or, (9 y ) - (18 y / 7) = 45

Or, 63 y - 18 y = 315

Or, 45 y = 315

Or, y = 7

From (Eq. 1),

x = 2 * 7 / 7 = 2

So, the number is 10 x + y = (10 * 2) + 7 = (20 + 7) = 27

Answer

Check:

Sum of the digits = 2 + 7 = 9

9 * 3 = 27 ✓

Adding 45 to the number 27, we get 72. So, the digits get reversed.
5 0
3 years ago
HELPPP!! BRAINLIEST IF U ANSWER
makvit [3.9K]

Answer:

180

Step-by-step explanation:

k = 3

v = 60

(Found v by dividing any of the top numbers by the bottom number, ex: 420/7 = 60)

3k = 3(60)

3k = 180

6 0
2 years ago
Read 2 more answers
What should be done so that the expression will have a value of 10?<br><br> 12 - 2 + 2 2 ÷ 8
Liula [17]
Answer: 10
use (PEMDAS)
P parentheses ()
E exponents
M multiplication • , () , x
D division
A addition +
S subtraction -
Explanation:
There are no parentheses.
There are exponents.
The multiplication is the exponents.
There is division.
There is addition and subtraction.
-how to solve-
First, do 2 to the second power and get 4.
Next, do 12-2+4 divided by 8.
Next do multiplication: there’s no more.
Next do division: you can’t do 4 divided by 8 so instead, do 12-2 = 10 plus 8.
Hope this helps!
3 0
2 years ago
on Monday Mr. Borden ran 4.6 miles in the morning and 0.78 miles that afternoon. on Tuesday he ran 3.4 miles. how much did he ru
topjm [15]
X = total miles run

4.6 + 0.78 + 3.4 = x
8.78 = x......so he ran a total of 8.78 miles
8 0
3 years ago
Can you guys tell me the answer to this question?
Vlad [161]

Answer:

I get the answer 52°......................

4 0
2 years ago
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