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Dimas [21]
3 years ago
11

a geography test has 6 questions worth 3 marks each and 16 questions worth 2 marks each. write an algebraic expression for each

situation
Mathematics
1 answer:
Verdich [7]3 years ago
4 0
(6 x 3) + (16 x 2)
You can use PEMDAS to break it down if you would like
1 question is worth 3 marks each and 1 question is worth 2 marks each
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Yx(y+1) + 4x(y + 1) - 5(y + 1) factor
zheka24 [161]

( yx + 4x - 5 )( y + 1 )

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5 0
3 years ago
add the term that makes the given expression into a perfect square. write the result as the square of a bracketed expression c s
Molodets [167]
<h2>Perfect Squares</h2>

Perfect square formula/rules:

  • a^2+2ab+b^2=(a+b)^2
  • a^2-2ab+b^2=(a-b)^2

Trinomials are often organized like ax^2+bx+c.

The <em>b</em> value in this case is <em>c</em>, and it will always equal the square of half of the <em>b</em> value.

  • Perfect square trinomial: ax^2+bx+(\dfrac{b}{2})^2
  • or ax^2-bx+(\dfrac{b}{2})^2

<h2>Solving the Question</h2>

We're given:

  • c^2-4c

In a trinomial, we're given the ax^2 and bx values. <em>a</em> in this case is 1 and <em>b</em> in this case is 4. To find the third value by dividing 4 by 2 and squaring the quotient:

  • 4 ÷ 2 = 2
  • 2² = 4

Therefore, the term that we can add is + 4.

c^2-4c+4

To write this as the square of a bracketed expression, we can follow the rule a^2-2ab+b^2=(a-b)^2:

(c-2)^2

<h2>Answer</h2>

c^2-4c+4

(c-2)^2

4 0
2 years ago
Suppose you’re in a class of 35 students. The instructor takes a simple random sample of seven students and observes their heigh
Dovator [93]

Answer:

The distribution of all values of <em>X</em> is the sampling distribution of <em>X</em>.

Step-by-step explanation:

The sampling distribution of a statistic is the probability distribution computed through a large number of samples taken from a specific population.

For example, the sampling distribution of mean is the probability distribution of sample mean, were the sample means are computed from various samples taken from a specific population.

In this case a class of 35 students is divided into samples of 7.

Each sample is considered and the heights of the 7 students are noted.

The random variable <em>X</em> is defined as the tallest height.

The distribution of all values of <em>X</em> is the sampling distribution of <em>X</em>.

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3 years ago
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Ulleksa [173]
I am pretty sure the answer to this question is A. Complex & Simple
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4 years ago
3x^2-16x-12 Solve for x
harkovskaia [24]
What the question???????
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