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lions [1.4K]
3 years ago
9

Best answer gets Brainliest!!! CHOOSE 3!

Mathematics
1 answer:
Mademuasel [1]3 years ago
6 0

Answer:

I think "A" for the first one

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I need this Now (2x + 1)²
Alla [95]

Answer:

4x² + 4x + 1

Step-by-step explanation:

We know that (a + b)² = a² + 2ab + b², therefore, (2x + 1)² = 4x² + 4x + 1.

7 0
3 years ago
Read 2 more answers
Nathan read 2 books in 10 months. What was his rate of reading in books per month
Novay_Z [31]
<h2>Answer:</h2><h2>The rate of reading a book per month = \frac{1}{5} = 20%</h2>

Step-by-step explanation:

Nathan read 2 books in 10 months.

The time taken to complete 1 book = \frac{10}{2} = 5 months

To complete 1 book it takes 5 months.

The rate of reading a book per month = \frac{1}{5} = 20%

4 0
3 years ago
Which of the following is a solution of x2 + 4x + 25?
blondinia [14]
Solve for x:
x^2 + 4 x + 25 = 0     I ssume that's the notation.
Subtract 25 from both sides:
x^2 + 4 x = -25
Add 4 to both sides:
x^2 + 4 x + 4 = -21
Write the left hand side as a square:
(x + 2)^2 = -21
Take the square root of both sides:
x + 2 = i sqrt(21) or x + 2 = -i sqrt(21)
Subtract 2 from both sides:
x = i sqrt(21) - 2 or x + 2 = -i sqrt(21)
Subtract 2 from both sides:
Answer: x = i sqrt(21) - 2 or x = -i sqrt(21) - 2
5 0
3 years ago
The perimeter of a rectangle is 34 it's width is 6.5. Write and equation to determine the length
SashulF [63]

34  = 2(6.5) + 2(l)
4 0
3 years ago
When 0.5 and the number n are multiplied the result is 2.5 what is the value of n​
tresset_1 [31]
<h2>0.5 × n = 2.5</h2>

  • first form an equation to solve the problem

  • <em>bring 0.5 over to the other side and divide it by 2.5</em>

<h3>n = 2.5 / 0.5</h3>

  • <em>the answer is </em>

<h3>n = 5</h3>

  • <em>so,</em>

<h2>0.5 × 5 = 2.5</h2>

hope that helps :)

8 0
3 years ago
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